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.
sags sagos sagas saigas segs zags skas sacs skuas sikas socas sacks segos soaks sakis sakes squaws segues sax sukkahs cigs secs suqs skis sics suks zigs sequoias socks sikes souks sooks skies seeks scows sucks sokes skees sykes skews sicks
ags mags shags tags dags zags sags rags peags nags lags bags quags gags jags hags fags wags yags