Poplar rhymes with:
doppler, coupler, doppler, epler, eppler, hepler, heppler, hippler, kappler, kempler, kepler, keppler, krempler, oppler, peppler, sampler, shepler, stempler, templar, wampler, weppler
Poplar sounds like:
paller, paylor, pealer, peavler, peebler, peeler, peller, peppler, peveler, pfahler, philhower, pilar, pillar, piller, pillory, plair, player, plier, pliler, plyler, poehler, polar, pooler, popolare, popular, pullara, puller, pylori