DIATOM is a playable word

diatom Scrabble® Dictionary

noun
pl. diatoms
any of a class of algae
58 Playable Words can be made from "DIATOM"
   2-Letter Words (17 found)
   3-Letter Words (25 found)
   4-Letter Words (13 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)