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.
harem hareem harm herm hermae
harem rem arm carom warm harm rearm hareem larum farm creme cream bireme bream barmy barm arum army ream karma proem dream charm
hare haar hair hairy harrow harry hear here hire hiree hoar hoary