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Is SEMIDIAMETERS a valid Scrabble word?

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

Base score before bonus squares; blank tiles score zero.

What does SEMIDIAMETERS mean?

Semidiameters is a form of SEMIDIAMETER.

  1. noun

    the apparent radius of a celestial body when viewed as a disc from the earth

Definitions from WordNet 3.1, Princeton University.

Points

Scrabble
18
Words With Friends
20
Letters
13

S (1) + E (1) + M (3) + I (1) + D (2) + I (1) + A (1) + M (3) + E (1) + T (1) + E (1) + R (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 SEMIDIAMETERS

SEMIDIAMETERS 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 SEMIDIAMETERS

The 60 highest-scoring words using these letters.

Study SEMIDIAMETERS and related words

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