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.
shags shogs shacks shakes shakos shackos shakoes showcase shackoes chugs shiksa shikse shocks shooks sheiks shucks sheikhs shicksa shikseh
shags hags ags sagos bags agas nags ragas rags dags zags wags chugs hogs whigs shogs fags vagus hugs peags jags gags kagus quags lags mags magus tags raggs sagas sags dagos jaggs yags
shag shaggy shack shacko shake shako shaky shog