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.
cornu cornua corn corny corona cornea coreign curn carn coronae carny crone crane cairn crony croon crown korun carnie koruna carina crania carney curran careen cairny cranny koruny carinae carrion gran grin karn kern kirn
cornu corny shorn worn sorn porno mourn moron morn lorn loran korun cornua born corn horny horn bourn boron borne porn porny torn shoran yourn
cor coir core coria corrie cory cowrie cowry score scoria scoriae