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.
segs segos segues secs sags sykes skies sakes seeks skees skews sikes sokes sagas sagos saigas sex sickees sickies skis suqs sequoias zags sexy skas cigs sacs zigs suks sics sicks socks sakis scows skuas sooks souks sucks socas sikas sacks soaks
begs kegs legs megs negs pegs regs segs tegs