ISOHYET is a playable word

isohyet Scrabble® Dictionary

noun
pl. isohyets
a line on a map connecting points having equal rainfall
97 Playable Words can be made from "ISOHYET"
   2-Letter Words (21 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)