multiplayer is a valid English word

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

Meanings

Adjective (NOT COMPARABLE)

(games) Requiring or allowing multiple (or more than the usual two) players to play simultaneously

Noun (COUNTABLE AND UNCOUNTABLE)

(games uncountable) The feature of a video game where multiple human players play simultaneously.
• I just heard that the game will have multiplayer when it comes out!
(in the plural) Video game players who play multiplayer games.

multiplayer is a Scrabble valid word

m3u1l1t1i1p3l1a1y4e1r1

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 18 points

multiplayer is an iScramble, QuickWords valid word

m1u2l3t4i5p6l7a8y9e10r11

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

Same letters words (Anagrams)

• none

Same letters plus one

• MULTIPLAYERS

Same letters minus one

• MULTILAYER
• MULTIPAYER
• REMULTIPLY