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.
manatees manats mantes mentees mannites manteaus maenades montes mantis mantas minutes maenads mantuas monades manitos manitus manitous maundies mints menads mounts maunds monads mondes minuets mantissa monetize monodies monetise hymnodies mends minds mondos mounds
manatees mentees donates sinuates senates ruinates penates neonates mantes nates phonates phenates hyphenates enates antes annates tannates
manat manatee maenad manito manitou manitu manta manteau mantua meant emanate