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.
slaker slacker sulker silkier sleeker slicker sulkier slaggier sleekier slogger slugger
laker flaker slaker leaker bleaker liker milkier colickier clicker flackery caulker balker balkier bilker flicker pluckier flickery blacker flakier bulkier slacker sleeker slicker sulkier talkier whelkier shlockier luckier blocker leakier folkier looker milker clocker clacker licker calker silkier blockier baulkier hulkier plucker flukier flockier locker lacker lakier sleekier sulker talker walker chalkier yolkier
slake selkie silk silkie silky slack slag slaggy sulk sulky