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.
remarry reamer remora rimer rumor rammer rhymer rimier rimmer roamer roomer rummer rumour rammier roomier rummier
marry remarry merry murry ambary mammary nummary smeary summary zamarra zamarro mar