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.
fermion vermin vermian ferryman ferrymen foramina pheromone firman fireman firemen foreman foremen freeman freemen foramen
fermion germina dromon dormin sermon permian pearmain carmine hormone bromin harmony harmine harmin vermin vermian ermine termini