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.
plucks placks plugs pollacks pollocks polkas plagues plaques pulques palookas pillowcase
lucks clucks plucks slacks sulks flecks klicks rowlocks relocks flacks pollacks bulks shlocks killocks killicks placks lacks hillocks flukes flocks flicks taluks bullocks cowlicks locks licks clocks rollicks pollocks caulks clicks blocks baulks bollocks clacks blacks mullocks hulks salukis slicks talukas shellacks shylocks
pluck plucky plack plica plicae plug