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12-Letter Words Starting With IS

  • 32 words
  • All English dictionaries
  • Scrabble points
Dictionary

Popular 12-Letter Words Starting With IS

The most familiar words on this list, with their Scrabble scores.

All 12-Letter Words Starting With IS 32 words

How common is IS at the start of twelve-letter words?

Our combined English word list has 32 twelve-letter words that start with IS. They average 18.1 points, the best is ISOENZYMATIC (28 points) and 34.4% end in S.

Total words
32
Average Scrabble score
18.1
out of 28 max
Everyday words
0%
common in ordinary English
Most common ending
S
34.4% of words

Most common last letters

  • s 34.4%
  • c 15.6%
  • y 15.6%

Top vowel pairs

  • ia12.5%
  • io6.3%
  • ei3.1%

Share of words where these two vowels sit side by side.

Rare words worth knowing

Valid in this dictionary but rarely seen in everyday English.

Highest-scoring twelve-letter word that starts with IS

i 1s 1o 1e 1n 1z 10y 4m 3a 1t 1i 1c 3

I 1 + S 1 + O 1 + E 1 + N 1 + Z 10 + Y 4 + M 3 + A 1 + T 1 + I 1 + C 3 = 28 points

Double word
56 pts
Triple word
84 pts

Face value of the tiles, then the whole word on a double- or triple-word square (letter bonuses and bingos not included).

isoenzymatic

No dictionary definition on file. This is a valid game word that standard dictionaries rarely cover.

  • Scrabble US
  • Scrabble UK
  • Words With Friends

Runners-up

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abcdefghijklmnopqrstuvwxyz

Words starting with IS by length

Change the last letter of IS

Trending word lists

Five-letter lists built from the letters of yesterday's Wordle answer. The set changes every day.

How to use this word list

Playing words that start with IS

12-Letter Words Starting With IS by the numbers

12-Letter Words Starting With IS FAQ

How many twelve-letter words that start with IS are there?

There are 32 twelve-letter words that start with IS in our combined English word list. Other dictionaries give different totals, so switch dictionary at the top of the list to compare.

What is the highest-scoring twelve-letter word that starts with IS?

ISOENZYMATIC is worth 28 points in Scrabble before any bonus squares. Other strong options are ISOCHRONIZED (27), ISOCHRONIZES (26), ISODIMORPHIC (22).

Which rare twelve-letter words that start with IS score well?

Uncommon but valid choices include ISOENZYMATIC (28), ISOCHRONIZED (27), ISOCHRONIZES (26), ISODIMORPHIC (22). Few players know them, so they can catch an opponent off guard.