VIFFS is a playable word

viff Scrabble® Dictionary

verb
viffed, viffing, viffs
to change direction abruptly of a vertical take-off aircraft
8 Playable Words can be made from "VIFFS"
   2-Letter Words (3 found)
   3-Letter Words (3 found)
   4-Letter Words (1 found)
   5-Letter Words (1 found)