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Is ISONIAZID a valid Scrabble word?

Yes, ISONIAZID is a valid word in US Scrabble and UK Scrabble, worth 19 points.

Base score before bonus squares; blank tiles score zero.

What does ISONIAZID mean?

  1. noun

    antibacterial drug (trade name Nydrazid) used to treat tuberculosis

Definitions from WordNet 3.1, Princeton University.

Points

19

Scrabble

20

Words With Friends

9

Letters

I (1) + S (1) + O (1) + N (1) + I (1) + A (1) + Z (10) + I (1) + D (2) = 19 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 ISONIAZID

Single letters that turn ISONIAZID 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 ISONIAZID

The 60 highest-scoring words using these letters.

Study ISONIAZID and related words

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