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.
plaque plague pulque plaguey plaguy plicae plug plack plica pluck polka plucky palooka pealike pollack
claque plaque league calque clique cliquey cloque colleague lalique plague pulque relique siliquae silique
pilau pilaw play plea pula splay