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.
skuas skas sikas squaws skis soukous suks sacs suqs sukkahs sags sequoias skews sagas sakes sacks seeks sagos socas sicks sokes sakis skees souks soaks sikes sykes socks skies sooks sucks saigas segues sickos scouse sax sickees sickies secs segs sics
skuas kas hakus hookahs hookas jukus quags okas haikus pikas quays skas sikas soukous sukkahs takas tikkas ukase chukkas yucas ruckus quass aquas quokkas kaas quais kues koas keas kays rakus kaes kakas jackass okays quasi squaws zaikais teguas tokays wekas yakuza yugas