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.
agama agma acme
gama agama gam agma dogma oogamy digamma ogam degami magma zygoma jicama squamae bigamy sigma gamy gaum gamma game gamba gamb gamay regma squama zeugma degame dicamba digamy chacma