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Is SUMMATION a valid Scrabble word?

Yes, SUMMATION is a valid word in US Scrabble and UK Scrabble, worth 13 points.

Base score before bonus squares; blank tiles score zero.

What does SUMMATION mean?

  1. noun

    a concluding summary (as in presenting a case before a law court)

  2. noun

    (physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce

  3. noun

    the final aggregate

    “the sum of all our troubles did not equal the misery they suffered”

  4. noun

    the arithmetic operation of summing; calculating the sum of two or more numbers

    “the summation of four and three gives seven”

Definitions from WordNet 3.1, Princeton University.

Points

13

Scrabble

17

Words With Friends

9

Letters

S (1) + U (1) + M (3) + M (3) + A (1) + T (1) + I (1) + O (1) + N (1) = 13 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 SUMMATION

Single letters that turn SUMMATION 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 SUMMATION

The 60 highest-scoring words using these letters.

Study SUMMATION and related words

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