Plymouth rhymes with:
behemoth, bismuth, dartmouth, demuth, falmouth, fellmeth, mammoth, monmouth, niemuth, portsmouth, samoth, warmoth, weymouth, wilmoth
Plymouth sounds like:
pallante, palmetto, palometa, palomita, pelland, philantha, piland, pilant, planed, planet, planned, plant, plante, planted, playmate, plenet, plenty, pliant, plinth, plummet, plummeted, poland, polland, pollinate, pollinated, polyamide, pyland, pylant