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.
glom gloam gloom gloomy glioma glum glim glam clomb golem glime glume gleam gleamy coelom cleome gallium coulomb coelome calm clam culm claim climb clime kalam kelim kilim qualm
coelom glom celom whilom shalom sholom