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.
gambit gamut gamete gambade gambado gumboot gummite gammadia gamed combat comity commit gammed gaumed gomuti gummata
ambit gambit dimity dammit summit smite samite reemit numbat mite mitt mity amity boehmite emit vomit fomite vomito combat comity commit gummite limit omit remit smit somite symbiot demit wombat
gamb gambia gamba gambe gam gamey agama cambia gama gamay gamy gamma game gaum gombo gumbo gammy ogam