ZYGOSITY is a playable word

zygosity Scrabble® Dictionary

noun
pl. zygosities
the makeup of a particular zygote
39 Playable Words can be made from "ZYGOSITY"
   2-Letter Words (12 found)
   3-Letter Words (16 found)
   4-Letter Words (8 found)
   5-Letter Words (2 found)
   8-Letter Words (1 found)