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.
hearses harasses hearsays horses heiresses harissas heresies heroizes heroicize
arses marses hearses parses carses horses arrases merises broses phereses kerseys brises braises frises arises arrises verses reraises erases arsis perses cruses praises curses brasses grasses krises courses xeroses choruses worses uruses urases torses tarsus druses diereses derrises saroses boreases purses cerises viruses gorses prises farces birses parises orrises prases jerseys morasses gyrases frasses erses crises wrasses eroses viroses fraises nurses proses morrises crases corses pareses bourses varuses rises rases hybrises roses irises ruses peruses greases lorises neuroses cuirasses burses creases rerises pharoses soroses raises diaereses xeruses harasses diureses hydrases ceruses terrases trasses phrases ureases whereases pursues charases sherrises
hearsay hears hearse hers haars hairs harass hares harissa heirs heres heresy heros hoars hoarse hoers