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.
vain van fain vine viny vein vane vina vino veiny fan fin vena faun fane foin fawn fano fine fino faena fanny fauna fawny feign finny veena venae venue
ain fain vain cain gain kain lain main pain rain sain tain wain chain an in