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.
black block bleak blocky bilk bullock bloc bulk balk bullocky bulky balky baulk bloke belga belike beluga beylik baulky beylic beelike belleek bowlike bowllike blog
alack slack plack shellack lack clack flack pollack black lac leak pluck iliac killick heliac block laky clock lake fleck flake flak klick lock bleak luck rollick slake mullock shellac flick shlock relock tilak ileac flock pollock cluck bullock flaky cowlick hillock lick killock coeliac celiac talcky laic kolacky kulak lilac kulaki cloak rowlock slick click lakh shylock
belay blae blah blaw bola bylaw