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.
munis muns muons minis monies manias mans mons minnies meinies menisci meanies manus manos means moons menus moans monos monas minas mense manas hymns mains miens manse mynas minus manes mines mensa mannas mensae moneys mynahs hymens mannose minnows meanness
munis uns tenias nisi minis funs monies lionise nannies duns ennuis genies heinies ruins fauns pennis unais buns fannies goonies pinnies jennies lunas meanies bunns quins johnnies lauans xenias yonis shinnies nouns shannies whinnies huns peonies tennis tauons denies saunas ranis zinnias tunnies finis lunies tunas muns runs faunas punas gunnies sunns bunnies penis lenis ponies guans bennies anise boonies conies lanais anis ionise bunas taenias hinnies ninnies loonies pennies townies suns toonies meinies phonies lunes minnies jinnis genius bennis guns puns beanies sanies danios muons tuns runes nuns funnies manias zanies rouens tawnies tenuis tunes unci tennies weenies wienies sonnies sheenies shuns dunes yuans
muni mun mania maun mini monie muon amnia amnio