multiuser is a valid English word

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

Meanings

Adjective (NOT COMPARABLE)

(computing telecommunications) Of an operating system, etc., having capabilities for serving many users simultaneously.

multiuser is a Scrabble valid word

m3u1l1t1i1u1s1e1r1

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

multiuser is not an iScramble, QuickWords valid word

m1u2l3t4i5u6s7e8r9

• The word is not valid in iScramble ✘
• The word is not valid in QuickWords ✘
• 45 points

Same letters words (Anagrams)

• none

Same letters plus one

• RETICULUMS
• TELLURIUMS

Same letters minus one

• MULTIUSE
• MULTURES