I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
ripely ripply reply repel rappel repeal replay ripple ropily reapply roupily replow repoll
ripely shapely ply reply peel peal cupel loopily peppily pily reapply repel play appeal pele roupily soapily speil spiel supply deploy duopoly chapel choppily ripply replay appel rappel apply byplay haply happily poly hiply lapel ploy ropily repeal sappily speel spell splay deeply dopily tupelo cheaply nippily paly
ripe rip tripe rape rope ropey rupee cripe grip gripey gripe grippe grippy gripy drip drippy trip trippy