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.
skis sakis skies suks sics skas sickies sakes sucks sacks sokes sykes skews sikes seeks sicks skuas socks sikas souks soaks skees sooks sickos saigas six sukkahs soukous sickees zaikais sequoias secs sacs sags suqs segs sagas sagos scows segos socas
kis kakis pikis rakis sakis skis tikis