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.
gamut gambit gamete gomuti gamed gammed gaumed commute gambade gambado gumboot gummata gummite gammadia
gamut mut maut mute mutt commute gomuti ramet smut dimout
gam gama gamay gamb gamba gambe gambia game gamey gamma gammy gamy gaum agama ogam