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.
carassow curassow crass caress cuirass cars cares crows cress carrs grass craws carse cross crissa cressy coarse kaross caries creasy grassy crease crosse carouse carries carious gars curs crus cors cris cries crazy grows croci currs crews grays cores guars cures croze gaurs craze coirs koras gross cruse curse corse cooers course crouse cruise creese curies curacy curios grease greasy kauris karoos