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.
closer classer closure glosser classier glossier colessor glassier glossary glazer glacier glazier glaziery
looser closer loser laser delouser lassoer realiser leaser pleaser lesser glosser lousier blousier classier classer ballsier blesser blowsier bluesier falser flosser flossier glassier glossier pulser releaser dialyser
close calos class classy cloys cloze colossi cols gloss glossa glossae glossy