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.
collect collocate collogued colligate colocate calked cloaked clagged clucked clogged clocked cleeked cliqued clicked clacked caulked calqued glaiket
collect elect hellcat polecat reelect select dialect
colleague collogue colloquia colloquy