HOLLOOS is a playable word

holloo Scrabble® Dictionary

verb
hollooed, hollooing, holloos
to hallo
26 Playable Words can be made from "HOLLOOS"
   2-Letter Words (6 found)
   3-Letter Words (8 found)
   4-Letter Words (6 found)
   5-Letter Words (3 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)