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.
manitu manitou manito mantua mannite manteau meant manta manat manatee mint monte maned minty maund mount maenad manned maundy mehndi mentee menudo minuet minute moaned monied
manitu nit unite dunnite snit sennit sanity reunite mantua knit manitou nite binit bonita bonito finite finito gahnite vanity gunite kainit kainite lenite lenity manito mannite pinite centu seniti sienite dunite unit unity
mania man amnia muni main mana mane manna mano many maun mawn mean meanie meany mini moan monie amain amnio