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.
gloom gloomy glom gloam glioma glum glam glim clomb glume gleam glime golem gleamy cleome coelom coelome coulomb gallium calm clam culm
loom bloom gloom gloam shalom coulomb telome celom gloomy glom coelom coelome clomb phyllome phloem bloomy loam whilom sholom
glow aglow igloo googly googol