HALLOS is a playable word

hallo Scrabble® Dictionary

verb
halloed, halloing, hallos or halloes
to shout
45 Playable Words can be made from "HALLOS"
   2-Letter Words (11 found)
   3-Letter Words (14 found)
   4-Letter Words (10 found)
   5-Letter Words (8 found)
   6-Letter Words (2 found)