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Is ISOMORPHOUS a valid Scrabble word?

Yes, ISOMORPHOUS is a valid word in US Scrabble and UK Scrabble, worth 18 points.

Base score before bonus squares; blank tiles score zero.

What does ISOMORPHOUS mean?

  1. adjective

    having similar appearance but genetically different

Definitions from WordNet 3.1, Princeton University.

Points

18

Scrabble

20

Words With Friends

11

Letters

I (1) + S (1) + O (1) + M (3) + O (1) + R (1) + P (3) + H (4) + O (1) + U (1) + S (1) = 18 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 ISOMORPHOUS

ISOMORPHOUS has no one-letter front or back hooks in US Scrabble. Adding a single letter to either end does not make another word in that list.

Front hooks0

None — nothing can be added to the front.

Back hooks0

None — nothing can be added to the end.

Words you can make from ISOMORPHOUS

The 60 highest-scoring words using these letters.

Study ISOMORPHOUS and related words

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