EXTREMER is a playable word

extreme Scrabble® Dictionary

adjective
extremer, extremest
existing in a very high degree
noun
pl. extremes
the highest degree
38 Playable Words can be made from "EXTREMER"
   2-Letter Words (7 found)
   3-Letter Words (9 found)
   4-Letter Words (8 found)
   5-Letter Words (8 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)