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.
sakis skis sakes soaks skies sacks saigas skas sacs zaikais suks sics sickies sags sagos sooks seeks skees souks sucks sykes skews sikas socks skuas sokes sicks sagas socas sikes squaws sickos sickees soukous six sukkahs sax sequoias secs segs suqs
rakis kakis sakis kis cookies backs auks lakhs quickies laics gawkies bikies rakes gawks sacks skies daks soaks leaks hookies jacks jauks hakus kaiaks rakus tekkies yacks takes shakes chuckies dickies wauks wacks makos quais kakas tacks peaks quacks macks hawks packs nookies wracks pokies kois jackies beaks hakes bekiss hacks sakes zaikais kiss haiks racks fakes bakes bookies lacks dawks wreaks skis hickies jakes hawkies paiks cakes rookies oaks pikis luckies makes hackies lakes sickies knacks takas quakes tikis laogais wakes whacks duckies shacks shakos teaks yaks
saki ski sack saiga sake skiey soak