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.
cressy cress creasy caress crews cares cross cries cures cores crass crease caries crissa greasy crosse curies creese grassy corries cuirass cowries curries carries cors curs cris cars crus curassow carassow corse greys grass grees craws carrs craze gores crazy coirs crows gorsy currs croze grues gross curse cruse carse cruise kersey curacy course crouse cooers grease coerce coarse kyries quires kaross coryza curios kauries quaeres carouse gurries curious curiosa carious queries kerries quarries
cressy dressy tressy grassy press tress drossy daresay greasy dress seeress prissy peeress phoresy cress duress brassy creasy resay caress heresy heiress morassy
care core crew cure acre ocrea ocreae scree screw screwy