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.
xenons zenanas zananas saneness
fanons cannons tenons xenons ninons pennons pinons guenons canons phonons guanins onions inions annonas mannans fanions conins nones rennins noons neons pinones minions pinions renins reunions munnions wanions quinins ionones nouns conenose honans bunions kinins venins anions nans quinones venenose linens renowns ronions nuns knowns nonas linins unions tannins chinones