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.
modular medullar medlar medullary modeler mutular modeller meddler middler motlier mottler muddler
modular nodular radular medlar medullar mutular pedlar pedlary titular titulary
moduli module modulo medulla medullae modal modally model