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.
ninnies nannies nines nonnews nenes nones nowness newness nuns nans nonas nouns nanas naans neons nonce nance noons knowns nonuse nuance
bunnies minnies shannies johnnies gunnies ninnies tennies funnies nannies shinnies fannies sonnies pinnies whinnies tunnies hinnies jennies bennies pennies bennis phonies nenes nines keenness ennuis zinnias zanies beanies peonies tennis loonies leanness nones sanies townies pennis monies vainness lunies shinneys jinnis meanness toonies wienies meinies boonies heinies joannes pannes genies meanies bonnes goonies tonnes donnees conies ponies dunness denies weenies nonnews wanness sheenies bennes tawnies