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.
sock socko soca souk soke sick suck sack sook soak sucky sicko sickie sickee sac suk ski sec ska sky sic zoic sago scow sika sake sego skua skee seek sike saki skew syke zouk skiey soggy
bock hock jock cock lock mock knock nock pock rock sock dock chock shock yock