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.
soaks sakes sakis socks souks sooks sacks socas sokes sacs skas soukous skis suks sags sequoias skees sykes skies zooks sicks sikes sikas sagos sucks skuas sagas scows zouks seeks segos skews squaws scouse saigas sickos sickees sukkahs sickies sox sax secs segs sics suqs zeks
oaks soaks nooks howks sakis lakhs hawks jakes hakes hookas kaiaks macks okes locks paiks wracks lacks goas hacks jocks cocas cocoas cooks quacks kakis makos jouks fakes mokes socks zooks yokes yocks tokes yacks shocks takas shakes chooks docks chocks whacks wakes lakes haiks teaks rakis knocks rocks sacks hocks daks racks sooks pocks hakus gooks koas auks kakas cakes bakes backs gowks okas mocks cokes ocas rakes hooks bocks looks biogas leaks gawks kooks knacks packs rakus wreaks makes cocks nocks jokes jauks quakes beaks peaks sokes pokes zouks rooks jacks sequoias sakes books takes hokes wacks socas wauks woks dawks chokes shacks tacks shakos shooks togas yaks yogas souks yoks
soak sack sake saki soca sock socko soke sook souk