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.
vagus vogues fags vacs vacuous vigs vugs fugus vigas vuggs fugues veggies faux figs fogs fugs
kagus magus vagus ags guys gauss cause hakus because lags agues auks mags fugus agas peags bogus rakus rugous sagos segues dagos degauss teguas wags shags raggs nags jaggs hags gigues jags gags fags jauks quags leagues negus vogues ragas fugues bags rags rogues sagas sags zags dags tags togues wauks yags