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Yes, SIS is a Scrabble word!

Letter values in Scrabble US: S 1, I 1, S 1.

Is it a valid word?

  • Scrabble US: valid, 3 points.

About SIS

SIS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

Definitions

noun

  1. a female person who has the same parents as another person
  2. 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
  3. 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)
  4. the syllable naming the seventh (subtonic) note of any musical scale in solmization

Synonyms

Also: atomic number 14, systeme international d'unites, systeme international, si system, si unit, international system of units, international system.

Not playable in Scrabble US: TE.

All synonyms of SIS

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