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.
cuirass crass curassow curs cures coirs carassow grass currs craws cress cross curse curios crosse curacy course grassy caress quires cruise creasy curies crissa cressy guiros crease curries curiosa curious cors kirs crus cars cris cries koras crows gurus kiers cares corse grays kurus crews guars cruse cores gross crazy carrs carse gaurs craze keirs coryza creese greasy kaross queers cooers kouros coarse crouse caries grease kauris kauries queries quaeres carries gurries cowries corries carouse carious queuers kerrias
cuirass grass trass nairas morassy morass mbiras liras wrasse grassy crass heiress harass frass brassy brass sirras tiaras ras