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.
creasy cressy crease greasy craws cures crews cares cress crass cries crazy cores caries caress creese curacy grassy curies grease curries carries corries cuirass cowries cars curs cors cris crus carassow curassow cross crows curse gorsy koras coirs grues grass carse cruse gores carrs greys craze croze corse grays grees currs crouse coryza curios coarse cruise crosse course coerce cooers quires kyries kersey crissa kauries quaeres kerries curiosa gurries curious carouse carious queries kerrias quarries
creasy greasy gears crease cressy grease phoresy grassy lears heresy rears daresay dressy tressy urease whereas shears nears eras hears fears ears resay bureaus brassy boreas bears areas morassy pears sears dears tears ureas wears choreas years
care core craw crew cure acre ocrea ocreae recarry wreaker scree screw screwy