grandmaster is a valid English word

Scrabble validity: valid ( international - Sowpods ), invalid ( US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Noun (COUNTABLE)

(chess) A player of the highest rank, as determined by FIDE, with an Elo rating of at least 2500. (From 1950.)
(chess historical) Short for Grandmaster of the Soviet Union; USSR champion.

grandmaster is a Scrabble valid word

grandmaster

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is not valid in Scrabble ✘
• 00 points

grandmaster is an iScramble, QuickWords valid word

grandmaster

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 00 points

Same letters words (Anagrams)

• none

Same letters plus one

• DRAGONMASTER
• GRANDMASTERS

Same letters minus one

• none