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.
cors coirs corse cores course cooers coarse cris curs cars crus kors cowries corries carse koras gores cress cross currs goers carrs curse cares crass gorse crews gorsy cures cruse cries crows craws creasy caries cressy curios coryza cruise coerce kouros crouse crosse caress curies crease creese crissa curiosa cuirass carouse carious carries curious curries kris gars kirs croze croci keirs crazy grows greys grees kiers gurus grays gross craze grues guars gaurs grass kurus
boors cors kors moors mors ors doors dors tors