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.
nancy nance nuance nans naans nanas nonce nuncio nannies nuns
fancy nancy chancy dance lance chance tansy bouncy fiance hance jouncy lunacy zincy wincey nance nuance pansy rance seance mincy
nan naan nana nannie nanny inane jnana