DELTA is a playable word

delta Scrabble® Dictionary

noun
pl. deltas
an alluvial deposit at the mouth of a river
(adjective) deltaic, deltic
44 Playable Words can be made from "DELTA"
   2-Letter Words (12 found)
   3-Letter Words (18 found)
   4-Letter Words (11 found)
   5-Letter Words (3 found)