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Is ISOMORPHISM a valid Scrabble word?

Yes, ISOMORPHISM is a valid word in US Scrabble and UK Scrabble, worth 20 points.

Base score before bonus squares; blank tiles score zero.

What does ISOMORPHISM mean?

  1. noun

    (biology) similarity or identity of form or shape or structure

Definitions from WordNet 3.1, Princeton University.

Points

20

Scrabble

22

Words With Friends

11

Letters

I (1) + S (1) + O (1) + M (3) + O (1) + R (1) + P (3) + H (4) + I (1) + S (1) + M (3) = 20 points in Scrabble.

Dictionary status

  • Scrabble (US & Canada)Valid
  • Scrabble (UK & worldwide)Valid
  • Words With FriendsListed

Scrabble lists: NWL2023 (US & Canada) and CSW24 (UK & worldwide). WWF uses our ENABLE reference plus verified additions. “Listed” and “Not listed” describe that reference; check acceptance in the game. Sources reviewed 2026-10-03.

Hooks for ISOMORPHISM

Single letters that turn ISOMORPHISM into another valid word in US Scrabble. Hooks let you extend a word already on the board.

Front hooks0

None — nothing can be added to the front.

Back hooks1

Words you can make from ISOMORPHISM

The 60 highest-scoring words using these letters.

Study ISOMORPHISM and related words

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