GEOPHONE is a playable word

geophone Scrabble® Dictionary

noun
pl. geophones
a device that detects vibrations in the earth
73 Playable Words can be made from "GEOPHONE"
   2-Letter Words (13 found)
   3-Letter Words (30 found)
   5-Letter Words (5 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)