DUATHLONS is a playable word

duathlon Scrabble® Dictionary

noun
pl. duathlons
a long-distance race involving running and bicycling
388 Playable Words can be made from "DUATHLONS"
   2-Letter Words (27 found)
   3-Letter Words (80 found)
   7-Letter Words (6 found)
   8-Letter Words (4 found)
   9-Letter Words (2 found)