NACRE is a playable word

nacre Scrabble® Dictionary

noun
pl. nacres
the pearly internal layer of certain shells
(adjective) nacred, nacreous
34 Playable Words can be made from "NACRE"
   2-Letter Words (8 found)
   3-Letter Words (12 found)
   4-Letter Words (10 found)
   5-Letter Words (4 found)