BUSES is a playable word

bus Scrabble® Dictionary

verb
bused, busing, buses or bussed, bussing, busses
to transport by bus (a large motor vehicle)
15 Playable Words can be made from "BUSES"
   2-Letter Words (3 found)
   3-Letter Words (7 found)
   4-Letter Words (4 found)
   5-Letter Words (1 found)