SERIF is a playable word

serif Scrabble® Dictionary

noun
pl. serifs
a fine line used to finish off the main stroke of a letter
(adjective) serifed, seriffed
41 Playable Words can be made from "SERIF"
   2-Letter Words (8 found)
   3-Letter Words (16 found)
   4-Letter Words (12 found)
   5-Letter Words (5 found)