CAIRN is a playable word

cairn Scrabble® Dictionary

noun
pl. cairns
a mound of stones set up as a memorial
(adjective) cairned, cairny
24 Playable Words can be made from "CAIRN"
   2-Letter Words (5 found)
   3-Letter Words (10 found)
   4-Letter Words (7 found)
   5-Letter Words (2 found)