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.
rephrase reverse rivieras rivers rovers revers refers refroze reavers refries refires rievers reverso reveres reefers roofers reivers referees refreeze reifiers reoffers reovirus reveries roughers ravers
phrase rephrase fraise euphrasy highrise diaphorase tephras