ZYGOSIS is a playable word

zygosis Scrabble® Dictionary

noun
pl. zygoses
the union of two gametes
(adjective) zygose
23 Playable Words can be made from "ZYGOSIS"
   2-Letter Words (9 found)
   3-Letter Words (7 found)
   4-Letter Words (5 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)