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.
manitou manito manitu mantua mannite manteau meant manta manat manatee mint mondo mound maned minty maund monte mount maenad manned maundy mehndi mentee menudo minuet minute moaned monied monody hymnody
manitou boniato bonito finito manito manitu nit