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.
sick sicko sic sickee sickie sack suck sike sika sock sucky socko ska sky sac suk sec ski syke skee souk sake saki scow skew soak seek soke sook soca skua zoic saiga skiey
hick hoick ick kick quick lick mick nick pick rick wrick sick dick tick wick chick