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.
calamus calms clams kalams claims culms glams climes clumsy qualms climbs gloams glomus gleams cleomes kaliums kalmias coeloms coulombs galliums coelomes kalimbas glims gloms glums glimes glooms glumes golems kelims kilims
calamus lams ulamas salamis kalams gloams glams lamas lambs lames llamas loams alamos blams blames flames flams fleams fullams claims clams gleams glomus salaams slams chlamys
calami calm clam claim clammy kalam