Skip to content
WWordFinderPro

Is SI a valid Scrabble word?

Yes, SI is a valid word in US Scrabble and UK Scrabble, worth 2 points.

Base score before bonus squares; blank tiles score zero.

What does SI mean?

  1. noun

    a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

  2. noun

    a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)

    “Today the United States is the only country in the world not totally committed to the Systeme International d'Unites”

  3. noun

    the syllable naming the seventh (subtonic) note of any musical scale in solmization

Definitions from WordNet 3.1, Princeton University.

Points

2

Scrabble

2

Words With Friends

2

Letters

S (1) + I (1) = 2 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 SI

Single letters that turn SI into another valid word in US Scrabble. Hooks let you extend a word already on the board.

Front hooks1

Back hooks10

Anagrams of SI

Words that use exactly the same letters.

Words you can make from SI

The 1 highest-scoring words using these letters.

Study SI and related words

Have a full rack? Use the word finder to find every word you can play.