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.
wyverns ferns varnas virions fieriness firns frons frowns furans farinas farness phrensy
wyverns erns terns serins reruns reearns hyperons liernes learns querns kerns kernes herons herns ferns ernes earns ternes yearns