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.
catalo cattalo cattail coattail cattle caudal coital cattily coitally caudally caudillo caudle cutely cuttle cadelle cuittle keitloa
cattalo catalo foetal vital hiatal cattail coattail keitloa fetal mutual meatal petal rattail ritual stale steal dotal whitlow chital notal teal fatal metal tali tale tala tail tael coital tall luteal natal pedalo ratal retail setal stall detail total chaetal hyetal
cat cate cattie catty coat coatee coati kata acta cacti scat scatt scatty