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.
modality motility mutuality modulate medaled modeled medalled modelled metalloid
duality nodality totality ideality natality fatality modality sodality vitality feudality mutuality daylit tallit fidelity futility motility sedulity sodalite utility
modal modally medal model module moduli modulo