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.
drugs drags trugs dregs druggies drouks drogues dreks dorks trogs darks trigs dirks drecks tragus drakes trucks trigos durocs darics darkeys darkies teargas torques derricks turacous turquois turquoise
rugs drugs shrugs frugs trugs bergs grogs trigs brigs erugos frags frigs bourgs crags virgas progs cercus sargos drags brags ergs rerigs burgs teargas grigs argus dregs sorgos circus arcus largos pargos prigs cargos rags frogs regs rigs trogs aerugos
drug druggie druggy drag draggy dreg dreggy drogue drouk trug