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.
roughers rovers roofers reoffers revers refers ravers rivers reveres refires rievers reavers reivers reverse reverso reefers refries referees reifiers reovirus reveries rivieras rivieres
coughers laughers roughers sighers weighers gophers ciphers cyphers spheres syphers