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.
whinnies whines wienies wines whins winoes wanness wins winnows weenies wains whens wanes winos wince winze whence whenas wheens wincey waeness woeness wans wens wons weans weens weensy
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
whinny whin whine whiney whiny winnow swinney win