MAXIMUM is a playable word

maximum Scrabble® Dictionary

noun
pl. maximums or maxima
the greatest possible amount, quantity, or degree
30 Playable Words can be made from "MAXIMUM"
   2-Letter Words (10 found)
   3-Letter Words (11 found)
   4-Letter Words (5 found)
   5-Letter Words (3 found)
   7-Letter Words (1 found)