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.
moonseed moonset mensed mooniest minced monist menaced monacid monazite monoacid monocyte
moonseed linseed nosed aniseed ensued ionised jonesed quinsied lensed lionised mensed rinsed censed sensed tensed unused
moons mons moans monas monos muons