INVARS is a playable word

invar Scrabble® Dictionary

noun
pl. invars
an iron-nickel alloy
61 Playable Words can be made from "INVARS"
   2-Letter Words (8 found)
   3-Letter Words (22 found)
   4-Letter Words (19 found)
   5-Letter Words (10 found)
   6-Letter Words (2 found)