Here's what rhymes with pyroclast.
last classed passed past fast cast vast blast caste hast mast massed harassed aghast amassed recast repast surpassed overcast unsurpassed enthusiast Words that almost rhyme with pyroclast
craft grasp laughed graft clasp crashed lashed raft clashed draft shaft dashed draught flashed gasp mashed slashed smashed staffed splashed telegraphed photographed handicraft mimeographed grant rat glanced grasped lacked wrapped cracked clapped clasped lapsed racked rapt that fact plant sat fat flat cat hat packed tract backed collapsed matched react trapped bat chat danced elapsed mapped mat pact ranked shalt tact tapped taxed cant capped chanced chant clamped cramped gasped hatched masked pat scratched slant slapped thatched tracked waxed canst hacked patched sacked tacked tat vat yanked attached attacked exact attract adapt relaxed snapped snatched thanked branched camped enact flanked scant spat stacked banked damped overlapped relapsed retract smacked stat strapped advanced impact enhanced extract detached intact financed stamped implant caveat democrat detract supplant abstract interact counteract despatched dispatched artifact distract encamped subtract transact habitat transplant diplomat aristocrat handicapped thermostat