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Is EXTENSION a valid Scrabble word?

Yes, EXTENSION is a valid word in US Scrabble and UK Scrabble, worth 16 points.

Base score before bonus squares; blank tiles score zero.

What does EXTENSION mean?

  1. noun

    a mutually agreed delay in the date set for the completion of a job or payment of a debt

    “they applied for an extension of the loan”

  2. noun

    act of expanding in scope; making more widely available

    “extension of the program to all in need”

  3. noun

    the spreading of something (a belief or practice) into new regions

  4. noun

    an educational opportunity provided by colleges and universities to people who are not enrolled as regular students

Definitions from WordNet 3.1, Princeton University.

Points

Scrabble
16
Words With Friends
18
Letters
9

E (1) + X (8) + T (1) + E (1) + N (1) + S (1) + I (1) + O (1) + N (1) = 16 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 EXTENSION

Single letters that turn EXTENSION 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 EXTENSION

The 60 highest-scoring words using these letters.

Study EXTENSION and related words

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