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.
block blocky bloc bullock black bloke bullocky bilk balk blog bulk bulky bleak baulk balky belike beylic beylik baulky beelike belleek bowlike bowllike
block relock pollock flock rowlock mullock shylock shlock hillock lock killock clock bullock shellack relook lick klick fleck killick cluck bullocky loco mullocky lack clack slick luck cloak shlocky cowlick look pluck black floc flick pollack loca click blocky talcky alack flocky bloke plack rollick slack bloc hillocky flack
below blooey blooie blow blowy bolo