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Is CASTOR a valid Scrabble word?

Yes, CASTOR is a valid word in US Scrabble and UK Scrabble, worth 8 points.

Base score before bonus squares; blank tiles score zero.

What does CASTOR mean?

  1. noun

    a multiple star with 6 components; second brightest in Gemini; close to Pollux

  2. noun

    a shaker with a perforated top for sprinkling powdered sugar

  3. noun

    a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable

  4. noun

    a hat made with the fur of a beaver (or similar material)

Definitions from WordNet 3.1, Princeton University.

Points

8

Scrabble

9

Words With Friends

6

Letters

C (3) + A (1) + S (1) + T (1) + O (1) + R (1) = 8 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 CASTOR

Single letters that turn CASTOR 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

Anagrams of CASTOR

Words that use exactly the same letters.

Words you can make from CASTOR

The 60 highest-scoring words using these letters.

Study CASTOR and related words

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