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.
presto prest purest preset priest poorest prost presidio purist prosit prosciutto prosody pursuit pressed preside prostie presidia porosity periostea praesidia prised priced prosciutti pursed prized prosed parsed prissed perused precede praised pierced pursued proceed parasite persuade
presto reest hairiest crest veriest prest poorest priest firriest freest eeriest searest rarest sorest reset fairest resod sourest wrest sheerest dearest burriest dourest rest driest resit leeriest teariest wariest queerest wiriest merriest charriest mooriest resat airiest forest erst beeriest serest purest rearrest aeriest fieriest sorriest wriest nearest preset furriest hoariest verst barest aristo airest tarriest miriest chariest merest weariest goriest truest leariest cheeriest barghest drest arrest direst breast surest yarest
presa prese press apres priss pursy pores purse prase purees prez prossie preys proso prees pros pries peres perse parse pars pareus pares pareos prise prissy prose pross prosy purs pursue pyres sprees