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.
zaikais sikas sakis saigas sickies skas zigs skis zeks zags soaks zooks sikes sakes sagas sicks sacks zouks sickos sickees sukkahs
zaikais bikies kakis pikas pikis sikas tikis tikkas kas kis