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.
mock moc moke muck mack mick mucky mickey mog mic myc mac make mako meek mica mike macaw moggy
bock hock jock cock lock mock knock nock pock rock sock dock chock shock yock