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.
quags quaggas quacks quakes gags quokkas kagus guacos quicks caiques guaiacs quickies cogs kegs
quags ags bags quais aquas agas quays quass jags quasi hugs fags lugs peags mugs ragas rags sagas sags squaws dagos dugs teguas wags shags yucas magus fugus bugs muggs vuggs vugs hags jaggs jugs kagus vagus fugs gags lags mags nags pugs raggs rugs sagos skuas zags dags tags tugs chugs yags yugas
quag quagga quaggy quack quacky quake quaky squawk