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.
manito manitou manitu mannite manat manta meant mantua manatee manteau mint monte maund minty mondo maned mount maenad manned maundy mehndi mentee menudo minuet minute moaned monied monody hymnody
bonito manito finito nit kainit lenite lento binit junto manitou knit mannite finite gahnite nite panto reunite sanity seniti sienite dunite tanto unit unity pinto bento boniato canto into kainite gentoo bonita lenity manitu conto pinite vanity gunite onto punto cento santo sennit snit dunnite tenuto unite unto
mania man amnia muni main mana mane manna mano many maun mawn mean meanie meany mini moan monie amain amnio