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.
kulak kulaki klik kolacky caulk clack cloak gulag klick killick killock clag
kulak lack tilak sulk slack pollack kulaki gulag clack hulky flaky flake flak flack bulky bulk black lake baulky baulk alack leak laky lakh hulk caulk cloak bleak plack pulik slake sulky shellack