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.
ravenous ravens revenues ravins ravines raffinose refines rifeness roughens ruffians roughness
venous ravenous saphenous venose venues venus vinous avenues euphonious revenues diaphanous
raven ravin ravine revenue riven roven craven graven