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.
quassia quasi quass cassia quays quais queasy gussie quiz cuss casa guess gussy gassy gauss kusso queys cusso cuisse gawsie kousso queazy queues
quassia cassia assai assay bassi bioassay lassi lassie massa messiah ossia dassie tassie ass