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10-Letter Words Starting With IS

  • 79 words
  • All English dictionaries
  • Scrabble points
Dictionary

Popular 10-Letter Words Starting With IS

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

All 10-Letter Words Starting With IS 79 words

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

Our combined English word list has 79 ten-letter words that start with IS. They average 14.6 points, the best is ISOENZYMIC (26 points) and 51.9% end in S.

Total words
79
Average Scrabble score
14.6
out of 26 max
Everyday words
0%
common in ordinary English
Most common ending
S
51.9% of words

Most common last letters

  • s 51.9%
  • c 20.3%
  • e 12.7%

Top vowel pairs

  • ie8.9%
  • ei6.3%
  • ia6.3%

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 ten-letter word that starts with IS

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

I 1 + S 1 + O 1 + E 1 + N 1 + Z 10 + Y 4 + M 3 + I 1 + C 3 = 26 points

Double word
52 pts
Triple word
78 pts

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

isoenzymic

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

  • Scrabble US
  • Scrabble UK
  • Words With Friends

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10-Letter Words Starting With IS by the numbers

10-Letter Words Starting With IS FAQ

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

There are 79 ten-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 ten-letter word that starts with IS?

ISOENZYMIC is worth 26 points in Scrabble before any bonus squares. Other strong options are ISOENZYMES (24), ISOMERIZED (22), ISOMERIZES (21).

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

Uncommon but valid choices include ISOENZYMIC (26), ISOENZYMES (24), ISOMERIZED (22), ISOMERIZES (21). Few players know them, so they can catch an opponent off guard.