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.
locum legume leucoma leukoma leukemia leukaemia
locum guaiocum cum vacuum hokum caecum guaiacum cecum scum
loca lock loco bloc block blocky floc flock flocky clock