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.
tennis tennies tenuis tenias tens tunnies taenias teens tense tenues teensy tonnes denies duennas townies tannoys tenuous tawnies toonies tins tuns tans dens tons tonneaus tains dense tunes deans denes tansy tones tonus towns tynes tines toons tunas donnas danios tineas tauons dienes tenace donnees dueness dunness tawneys townees deionize
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
ten taenia taeniae tannoy teen teeny tenia teniae tinny tonne tonneau tunny steno