Quashing rhymes with:
abolishing, accomplishing, admonishing, ambushing, anguishing, astonishing, banishing, bashing, blushing, brainwashing, brandishing, brushing, caching, cashing, cherishing, clashing, crashing, crushing, cushing, dashing, demolishing, diminishing, dishing, dishwashing, distinguishing, embellishing, enmeshing, establishing, extinguishing, fasching, finishing, fishing, flashing, flourishing, flushing, furbishing, furnishing, gnashing, gushing, hashing, impoverishing, languishing, lashing, lavishing, meshing, nourishing, onrushing, overfishing, perishing, pershing, photofinishing, polishing, publishing, punishing, pushing, ravishing, reestablishing, refinishing, refreshing, refurbishing, rehashing, relinquishing, relishing, replenishing, rushing, skirmishing, slashing, sloshing, smashing, smoshing, splashing, squashing, stashing, tarnishing, thrashing, trashing, unleashing, vanishing, washing, wishing
Quashing sounds like:
qing, qmax, quaking, quanex, quang, queasiness, queen's, queens, queensway, quench, quenches, queuing, quickening, quickens, quickness, quina's, quince, quincey, quincy, quincy's, quinn's, quinoco, quinones, quinonez, quizzing