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