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.
nidal nodal nodally natal notal neatly needle noddle nodule noodle nudely nattily nautili needily nuttily knottily
geoidal tidal hyoidal nidal zooidal dal audial dedal dial pedalo nodal idle radiale modal medal caudal dahl dale chital medial deal idol dual seidel idly sidle daedal redial hadal idyl feudal pedal coital vital radial ideal
nada naiad nide nidi cnida cnidae snide