1) Act the iconoclast 2) Blackguard 3) Expose 4) Expose a charlatan 5) Expose as a fraud 6) Expose as a myth 7) Expose as false 8) Expose false claims 9) Expose the false claims of 10) Expose the falseness of 11) Expose while ridiculing 12) Jest at 13) Laugh at 14) Make fun 15) Poke full of holes 16) Poke fun Found on https://www.crosswordclues.com/clue/debunk
exposeverb expose while ridiculing; especially of pretentious or false claims and ideas; `The physicist debunked the psychic`s claims` Found on https://www.encyclo.co.uk/local/20974
to expose or excoriate (a claim, assertion, sentiment, etc.) as being pretentious, false, or exaggerated: to debunk advertising slogans. Found on https://www.infoplease.com/dictionary/debunk