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.
snipe snip snippy sinopie snap sneap snoop sunup sannop sannup snappy snoopy senopia sinopia
snipe nip nape nipa nope genip canape snip