Words Starting With IS
Browse every English word that starts with the letter IS. This list is sourced from a 350 000-word dictionary and includes Scrabble-valid entries with their point scores. Use the full Word Unscrambler to filter by length, ending, or tile combination.
This page summarises 887 valid words — mean length 12.6, mean score 20.1.
- Total words
- 887
- Avg length
- 12.6 letters
- Avg Scrabble score
- 20.1 pts
- Highest scoring
- isorhythmically (31 pts)
- Longest word
- isorhythmically (15 letters)
- High-value letter words
- 17(9%)
- Words containing Q, X, Z, J, K (8–10 pt tiles)
About this word list
At 887 words, this list covers common playable words alongside lesser-known entries accepted in competitive Scrabble. Among these entries, 17 contain rare tiles that can dramatically boost your score when played on double- or triple-letter squares. Common endings in this list include -IC, -AL, -LY, -LLY — patterns that let you extend words already on the board. Shared prefixes like IS, ISO, ISC, IST cluster in this list — useful when you need to open a specific row or column. The highest-scoring word shown is isorhythmically at 31 points. While Wordle uses a smaller answer list, studying broader dictionary patterns here helps you eliminate impossible guesses faster. Competitive Scrabble strategy relies on pattern recognition. Lists like this train your brain to spot playable words under time pressure. With a vowel ratio of 0.44, this list skews consonant-heavy — keep extra vowels on your rack when targeting these words.
Try the Pattern Finder → for combined filters like starts-with, ends-with, include/exclude letters, and exact length.
Strategy & study tips
A deep result pool supports spaced repetition — study one length bucket per day rather than cramming the full scroll in a single sitting. About 9% of sampled words include a high-value letter (Q, X, Z, J, or K) — useful when planning premium-square plays.
Internal links point to Pattern Finder, Crossword Solver, Anagram Solver, and Wordle Solver — each tool adds interactivity this static list intentionally omits. Average Scrabble value here is 20.1 points — use that as a floor for acceptable plays when board space is tight. Review related searches at the bottom of this page to hop between adjacent patterns without competing URLs in search results.
Top words preview
Scrabble-focused summaries for high-value entries (not full dictionary definitions). Tap a word for score breakdowns and anagrams.
- ISORHYTHMICALLY (15 letters, 31 Scrabble pts) — consonant-heavy playable entry.
- ISCHIOCOCCYGEAL (15 letters, 30 Scrabble pts) — balanced vowels and consonants playable entry.
- ISOBATHYTHERMIC (15 letters, 30 Scrabble pts) — consonant-heavy playable entry.
- ISOALLOXAZINE (13 letters, 29 Scrabble pts) — balanced vowels and consonants playable entry. Includes rare letters (Q, X, or Z) prized in competitive Scrabble.
- ISOBATHYTHERMAL (15 letters, 28 Scrabble pts) — consonant-heavy playable entry.
- ISOIMMUNIZATION (15 letters, 28 Scrabble pts) — balanced vowels and consonants playable entry. Includes rare letters (Q, X, or Z) prized in competitive Scrabble.
- ISOHYDROCYANIC (14 letters, 28 Scrabble pts) — balanced vowels and consonants playable entry.
- ISOCHRONIZING (13 letters, 28 Scrabble pts) — balanced vowels and consonants playable entry. Includes rare letters (Q, X, or Z) prized in competitive Scrabble.
Word list
Showing top 200 of 887 matches, sorted by length and Scrabble score.
15-letter words
- isorhythmically31 pts
- ischiococcygeal30 pts
- isobathythermic30 pts
- isobathythermal28 pts
- isoimmunization28 pts
- isosulphocyanic27 pts
- isothermobathic27 pts
- isomeromorphism26 pts
- isopropylacetic26 pts
- ischiocavernous25 pts
- ischiovertebral25 pts
- isopodimorphous25 pts
- isothiocyanates23 pts
- isoelectrically22 pts
- ischioneuralgia21 pts
- isoantigenicity21 pts
- isoperimetrical21 pts
- isoagglutinogen18 pts
- isopelletierine17 pts
- isolationalists15 pts
14-letter words
- isohydrocyanic28 pts
- isochlorophyll27 pts
- isomorphically26 pts
- isographically25 pts
- isohydrosorbic25 pts
- isohemopyrrole24 pts
- isothermobaths24 pts
- ischiocapsular23 pts
- isocorybulbine23 pts
- isopropylamine23 pts
- isotrimorphism23 pts
- ischioperineal21 pts
- isentropically21 pts
- isocarbostyril21 pts
- isopiestically21 pts
- isotherombrose21 pts
- isotrimorphous21 pts
- isopilocarpine20 pts
- isocholesterin19 pts
- isocholesterol19 pts
- isodiametrical19 pts
- isovalerianate17 pts
- isolationalism16 pts
- isopelletierin16 pts
- isolationalist14 pts
13-letter words
- isoalloxazine29 pts
- isochronizing28 pts
- isobenzofuran27 pts
- isobathytherm26 pts
- ischiorrhogic24 pts
- isomerization24 pts
- isoquercitrin24 pts
- ischiofemoral23 pts
- ischiofibular23 pts
- isodimorphism23 pts
- isothermobath23 pts
- isothiocyanic23 pts
- ischiovaginal22 pts
- isocorybulbin22 pts
- isotrimorphic22 pts
- isthmectomies22 pts
- isochronously21 pts
- isodimorphous21 pts
- isogeothermic21 pts
- isometrograph21 pts
- isostrychnine21 pts
- isocinchonine20 pts
- isoclinically20 pts
- isometrically20 pts
- isophenomenal20 pts
- isosmotically20 pts
- isidiophorous19 pts
- isobarbituric19 pts
- isobarometric19 pts
- isodrosotherm19 pts
- isogeothermal19 pts
- isohesperidin19 pts
- isoperimetric19 pts
- isospondylous19 pts
- istiophoridae19 pts
- isobiogenetic18 pts
- isostatically18 pts
- isovalerianic18 pts
- israeliteship18 pts
- ismaticalness17 pts
- isoelectronic17 pts
- isoasparagine16 pts
- islandologist15 pts
- isoagglutinin15 pts
- isoproterenol15 pts
- isostructural15 pts
- isolationists13 pts
12-letter words
- isoenzymatic28 pts
- isochronized27 pts
- isorrhythmic25 pts
- islamization23 pts
- isoamylethyl23 pts
- isocamphoric23 pts
- isopyromucic23 pts
- isodiazotate22 pts
- isodimorphic22 pts
- isoyohimbine22 pts
- ischiobulbar21 pts
- isocephalism21 pts
- isochromatic21 pts
- isomorphisms21 pts
- isoquinoline21 pts
- isosaccharic21 pts
- ischiocaudal20 pts
- ischiopodite20 pts
- ishmaelitish20 pts
- isochronally20 pts
- isodactylism20 pts
- isodynamical20 pts
- isogenotypic20 pts
- isographical20 pts
- isohemolysis20 pts
- isothermally20 pts
- isothiocyano20 pts
- isagogically19 pts
- ischiocerite19 pts
- ischiorectal19 pts
- ischiosacral19 pts
- ischiotibial19 pts
- ishmaelitism19 pts
- isoamylamine19 pts
- isocephalous19 pts
- isocheimenal19 pts
- isocheimonal19 pts
- isochronical19 pts
- isomerically19 pts
- isoperimetry19 pts
- isosaccharin19 pts
- isothermical19 pts
- isotopically19 pts
- isthmistical19 pts
- isoamylidene18 pts
- isodactylous18 pts
- isocyanurate17 pts
- isodiametric17 pts
- isotonically17 pts
- isovoluminal17 pts
- iscariotical16 pts
- isepiptesial16 pts
- isidiiferous16 pts
- ismaelitical16 pts
- isobarbaloin16 pts
- isocardiidae16 pts
- isonicotinic16 pts
- isoperimeter16 pts
- isopolitical16 pts
- isoseismical16 pts
- isoteniscope16 pts
- isoantigenic15 pts
- isoenergetic15 pts
- isomastigate15 pts
- isotrehalose15 pts
- isobilateral14 pts
- isoindigotin14 pts
- isolationism14 pts
- isolinolenic14 pts
- isonitramine14 pts
- isoprenaline14 pts
- isostemonous14 pts
- isogoniostat13 pts
- isorosindone13 pts
- isolationist12 pts
11-letter words
- isochronize25 pts
- isoimmunize24 pts
- isorhythmic24 pts
- isomerizing23 pts
- isthmectomy23 pts
- ischiopubic22 pts
- isophthalyl22 pts
- ischocholia21 pts
- isoindazole21 pts
- isophthalic21 pts
- isoxanthine21 pts
- ischiopubis20 pts
- isocephalic20 pts
- isomorphism20 pts
- isopsephism20 pts
- israelitize20 pts
- ischiadicus19 pts
- isoparaffin19 pts
- isophyllous19 pts
- isopicramic19 pts
- isopodiform19 pts
- ischioiliac18 pts
- isenthalpic18 pts
- ishmaelitic18 pts
- isochimenal18 pts
- isocholanic18 pts
- isochronism18 pts
- isocyanuric18 pts
- isoimmunity18 pts
- isolapachol18 pts
- isomorphous18 pts
- isonephelic18 pts
- isopropenyl18 pts
How to use this list
Bookmark this list for offline study: the top 20 entries by score cover the highest-impact words for casual games.
Related searches
Players who viewed this list also explore: Word Pattern Finder, Crossword Solver, Daily Puzzle Hints, Word Unscrambler, Anagram Solver, Scrabble Score Calculator. Follow the links for adjacent patterns, tools, and per-word score pages.
Frequently asked questions
- Why do starting letters matter in Scrabble?
- Knowing words that start with a specific letter helps you plan plays when certain tiles are already on the board, when you need to hook onto an existing word, or when you want to open a specific row or column.
- How many words match this pattern?
- Our dictionary contains 887 words matching this pattern. The average length is 12.6 letters and the average Scrabble score is 20.1 points. The highest-scoring entry shown is isorhythmically (31 pts).
- Are there high-scoring words in this list?
- 17 words in this sample include premium letters (Q, X, Z, J, or K). These are strong candidates for double- and triple-letter square plays in Scrabble.
- Is this page useful for Wordle?
- Yes. Wordle uses 5-letter words, so length-filtered lists and pattern pages help you validate guesses and build a mental dictionary of allowed combinations before you play.
- Are these valid Scrabble words?
- Yes. Results are drawn from a standard English word list that aligns closely with the official Scrabble dictionary. All displayed words are accepted in competitive Scrabble play.
- Can I use these words in Words with Friends?
- Most Scrabble-valid words are also legal in Words with Friends. The two games use slightly different word lists, but the overlap is large. Use this list as a solid starting point for either game.
- How are the point scores calculated?
- Scores are the raw sum of standard Scrabble letter values (A=1, B=3, C=3, D=2 … Z=10) without board multipliers. Higher-scoring words contain rarer letters like Q, X, or Z.
- Can I combine multiple pattern filters?
- Yes. Use the Pattern Finder to combine starts-with, ends-with, contains, exact length, include letters, and exclude letters in a single search — the same engine that powers these curated lists.
- How many words are in the dictionary?
- The dictionary contains over 350 000 English words, covering everything from common 2-letter words to rare 15-letter entries, with proper nouns and abbreviations excluded.
- Is this tool free to use?
- Yes. All word lists and search tools on unscrambletools.com are completely free with no registration required.