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14 Letter Words Starting With IS

There are 37 valid 14 letter words that start with IS, drawn from NWL2023, CSW24, and Words With Friends. Sorted below by score, with the single highest scorer called out.

Highest Scoring 14-Letter Words

US Scrabble (NWL)

isocarboxazids - 35 points

UK Scrabble (CSW)

isocarboxazids - 35 points

Words With Friends

isocarboxazids - 37 points

14 Letter Words (37)

View all words starting with IS

Top 20 Highest-Scoring 14 Letter Words Starting With is

Point values shown for US Scrabble, UK Scrabble, and Words With Friends. The average across this full 37 word list is 72.2 combined points.

Rank Word US Scrabble UK Scrabble WWF Points Total
#1 ischiocapsular 23 23 27 73
#2 ischioperineal 21 21 24 66
#3 isentropically 21 21 25 67
#4 isoagglutinins 16 16 22 54
#5 isoalloxazines 30 30 33 93
#6 isocarbostyril 21 21 23 65
🏆 #7 isocarboxazids 35 35 37 107
#8 isochlorophyll 27 27 29 83
#9 isocholesterin 19 19 21 59
#10 isocholesterol 19 19 21 59
#11 isochromosomes 23 23 25 71
#12 isocorybulbine 23 23 28 74
#13 isodiametrical 19 19 22 60
#14 isodimorphisms 24 24 26 74
#15 isogeothermals 20 20 22 62
#16 isogeothermics 22 22 24 68
#17 isographically 25 25 28 78
#18 isohemopyrrole 24 24 25 73
#19 isohydrocyanic 28 28 28 84
#20 isohydrosorbic 25 25 25 75

Where 14 Letter Words Fit on the Board

At 14 letters, a word almost always uses your entire rack plus tiles already on the board these are realistically bingo-adjacent plays rather than everyday moves, which is why the list leans heavily on compound and suffixed forms (-nesses, -ation, -izing). If you're looking for words you can play more often, shorter lengths starting with IS will give you far more flexible options try 14 letter words starting with IS for a more practical middle ground.

Frequently Asked Questions

What is the highest-scoring 14 letter word starting with is?

isocarboxazids — worth 107 combined points (US Scrabble: 35, UK Scrabble: 35, Words With Friends: 37).

How many 14 letter words start with is?

37 valid words, combining entries from NWL2023, CSW24, and the Words With Friends dictionary.

Are 14 letter words realistic to actually play?

Only occasionally — you'd need most of your rack plus letters already on the board to reach 14 tiles. They're worth knowing for the rare bingo-extension play, but for regular turns, shorter is words will come up far more often.