EIGHTHLY is a playable word

eighthly Scrabble® Dictionary

adverb
in the eighth place
66 Playable Words can be made from "EIGHTHLY"
   2-Letter Words (11 found)
   3-Letter Words (28 found)
   4-Letter Words (14 found)
   5-Letter Words (8 found)
   6-Letter Words (4 found)
   8-Letter Words (1 found)