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.
pinene pinon pinion pennine panini panino pennon
nene venene pinene neon gunnen linen lineny dynein
piney pine pin pion spinny piny spine pinny opine pinnae apnea pone pina pinna piano pian pein pane pain epinaoi spin spinney spiny