PRIMER is a playable word

primer Scrabble® Dictionary

noun
pl. primers
a book that covers the basics of a subject
31 Playable Words can be made from "PRIMER"
   2-Letter Words (7 found)
   3-Letter Words (11 found)
   4-Letter Words (8 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)