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.
pentane pentene pintano pontine ponton pontoon panettone panettoni pandani
pentane montane tontine suntan fountain intine intone contain quintain quintan lantana lindane maintain mountain mundane pentene pintano pontine dentine untune