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13-Letter Words Starting With I

  • 925 words
  • All English dictionaries
  • Scrabble points
Dictionary

Popular 13-Letter Words Starting With I

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

All 13-Letter Words Starting With I 925 words

How common is I at the start of thirteen-letter words?

Our combined English word list has 925 thirteen-letter words that start with I. They average 18.7 points, the best is ISOCARBOXAZID (34 points) and 40.1% end in S.

Total words
925
Average Scrabble score
18.7
out of 34 max
Everyday words
11%
common in ordinary English
Most common ending
S
40.1% of words

Most common last letters

  • s 40.1%
  • y 21.3%
  • e 11.1%

Top vowel pairs

  • io21%
  • ie8.3%
  • ia7.1%

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 thirteen-letter word that starts with I

i 1s 1o 1c 3a 1r 1b 3o 1x 8a 1z 10i 1d 2

I 1 + S 1 + O 1 + C 3 + A 1 + R 1 + B 3 + O 1 + X 8 + A 1 + Z 10 + I 1 + D 2 = 34 points

Double word
68 pts
Triple word
102 pts

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

isocarboxazid

  1. nouna monoamine oxidase inhibitor (trade name Marplan) that is used to treat clinical depression
  • Scrabble US
  • Scrabble UK
  • Words With Friends

Runners-up

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13-Letter Words Starting With I by the numbers

13-Letter Words Starting With I FAQ

How many thirteen-letter words that start with I are there?

There are 925 thirteen-letter words that start with I 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 thirteen-letter word that starts with I?

ISOCARBOXAZID is worth 34 points in Scrabble before any bonus squares. Other strong options are IMMUNOCOMPLEX (30), ISOALLOXAZINE (29), INEXPENSIVELY (28).

What are some common thirteen-letter words that start with I?

Everyday examples include INCONVENIENCE, INTERNATIONAL, INDEPENDENTLY, INVESTIGATION, INAPPROPRIATE, INTRINSICALLY, IDIOSYNCRATIC, INTERACTIVELY. Sort the list by "Most common" to see the familiar words first.

Which rare thirteen-letter words that start with I score well?

Uncommon but valid choices include ISOCARBOXAZID (34), IMMUNOCOMPLEX (30), ISOALLOXAZINE (29), INCENTIVIZING (28). Few players know them, so they can catch an opponent off guard.