STRATI is a playable word

stratus Scrabble® Dictionary

noun
pl. strati or stratuses
a type of cloud
60 Playable Words can be made from "STRATI"
   2-Letter Words (9 found)
   3-Letter Words (21 found)
   4-Letter Words (17 found)
   5-Letter Words (9 found)
   6-Letter Words (4 found)