OPSIMATHS is a playable word

opsimath Scrabble® Dictionary

noun
pl. opsimaths
a person who learns only late in life
367 Playable Words can be made from "OPSIMATHS"
   2-Letter Words (28 found)
   3-Letter Words (86 found)
   7-Letter Words (7 found)
   8-Letter Words (2 found)
   9-Letter Words (1 found)