SUBTAXA is a playable word

subtaxon Scrabble® Dictionary

noun
pl. subtaxons or subtaxa
a subdivision of a taxon
56 Playable Words can be made from "SUBTAXA"
   2-Letter Words (10 found)
   3-Letter Words (22 found)
   4-Letter Words (17 found)
   5-Letter Words (5 found)
   7-Letter Words (2 found)