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.
dosage
sage visage massage message passage sausage dosage usage sagy assuage messuage
dos does dose doss douse dows dowse duos ados doats dots udos