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.
slakes slacks sulkies selkies silkies sulks slags silks sleeks slicks salukis silicas siliques silex slogs slugs sulcus sawlogs
lakes slakes flakes lacks silkies luckies likes leaks lakhs calks lackeys cloaks balks talkies tilaks chalks alkies blacks kylikes pollacks folkies clacks kulaks placks selkies slacks bleaks flukes sulkies blokes talks flacks walks shellacks
slake selkie silk silkie silky slack slag slaggy sulk sulky