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.
crisis crises crasis cruises cruses carses krises crases curses corses crosses crazies creases carices cresses creeses courses caresses curacies carouses griseous cuirasses curassows carassows cruces crazes gorses crozes coriaceous grasses coryzas grosses coerces grouses kerseys greases gracioso gracious grazioso karosses
crisis merisis raises hybrises fraises frises pheresis phoresies bruises virosis irises narcissi rises orrises parises prises prossies reraises cerises xerosis diaeresis diuresis crises brassies cruises morrises arrises arises risus heresies crasis brises arsis krises merises lorises braises neurosis paresis praises prissies pyrosis rerises sorosis derrises dieresis sherrises
cris crissa kris curs curiosa curies crus cruise crosse cross cries cressy crass cress corse cors carse cars carious caries cruse curios curious curse scries