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.
bennis bennies bennes bens bunnies beanies benes bunns beans banns beanos bonnes boonies bins bans buns banes bones bonus boons bunas bines banzai bonaci bonsai
bennis jinnis pennis tennis hinnies ennuis conns sennas peonies meanies tenias bonnes funnies pinnies shannies ranis unais anis fannies donnas goonies sunns boonies bunnies bunns tonnes shinnies whinnies townies joannes zanies sonnies beanies bennies cannas lanais linns taenias danios heinies minis monies nannies ninnies pannes pennies bennes loonies zinnias lunies wienies genies finis siennas johnnies annas wynns tunnies sunnas ponies jennies conies lenis mannas goannas lionise phonies jinns gunnies nisi hennas manias tenuis meinies banns inns penis sanies munis nans anise ionise pinnas nuns sheenies denies duennas minnies tawnies tennies xenias genius toonies weenies yonis
benne benni benny ben bean beanie beano been bene biennia bonne bonnie bonny bunn bunny