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.
prosit prost porosity pursuit prostie prosciutto prosciutti prest parasite prussiate preset purist priest prosed periostea purest poorest prosody preside presidia presidio praesidia parsed pursed prised prized presto priced peracid perused praised pressed prissed proceed pursued persuade
prosit frosty torosity cerussite pursuit frost parasite merozoite curiosity cariosity jarosite horst varsity frowst resit resite aerosat roust roset roost roast morosity porosity prost cerusite serosity worst
pros prossie proso pross prose prosy presa uprose prase pursy proas purse prise prows parous prese pars parse perse press prissy priss purs praos pursue porous pyros porose uprouse