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.
macaws macs macks micas mags mycs mics mocs makos mucus magus mocks makes micks mucks megass mucose mucous maquis magueys megasse mickeys max
macaws caws showcase decays squaws scows picas ocas casa case cays cows gawsy hawks geegaws gewgaws cacaos cacas cocas cocoas gawks micas pacas cycas socas dawks chicas yucas