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.
vernal vernally frenula
vernal diurnal tarnal journal carnal urinal cranial triennial kernel treenail renal doornail coronal baronial darnel peroneal hernial corneal carinal perennial trinal renail trenail morainal bairnly geranial preanal perineal cornel neuronal cornual charnel
fern ferny varna overnew overran overrun