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.
condole condyle candle gondola canoodle conidial conoidal kindle cantle gonadal candela gonadial gonidial connately cantal kindly cantala kantele
condole indole wandle bindle bundle fondle handle hondle indol condyle candle gondola kindle mandola rundle dandle dindle windle
condo coned conidia connote conoid conto