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.
nuance nance nonce nancy nuncio nannies nuns nans nouns nones nines nanas nenes naans nonuse newness ninnies nonnews nowness nonissue
fiance seance chance dance nance hance rance nuance lance kanes manes hence quince hanse lanes menace ponce lianes panes whence fancy nancy janes canes pinnace pounce sanes nonce fiancee chancy wincey wince once launce since tenace bounce jaunce banes nice fanes faience panacea fence vanes manse ounce jounce pence mince dunce wanes science anes yince
nun nan naan nana nannie nanny noun inane jnana guanin guanine