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.
gamay gama gamy gammy gamey gamba gamma gam gambia gaum gamb game goombay gambe gumma gummy caeoma cambia cam gum came camo coma kame kami
gamay ama may whammy zamia samba mammy mamey llama goombay mama amah amia beamy embay lamby shammy foamy hammy jammy gamy chammy tammy lama seamy gama rammy mamma gamba gammy mamba gamma loamy gamey lamia shamoy