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.
refires refries referees reifiers refers reivers reveres refroze reefers refreeze rivieres reovirus reveries reoffers ravers revers rivers rovers reavers reverse reverso rievers roofers rephrase rivieras roughers
fires refires firs vireos defiers froes zaffirs frees reifiers kaffirs fries caviares affairs affaires vires feres fores fares fairs fairies coiffures kafirs livres fiars kefirs refries rivieres zaffres deifiers
refire reefier refer referee refry reifier prefire