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.
foramina foramen fermion foreman foremen firman vermin fireman firemen freeman freemen vermian ferryman ferrymen
foramina ramona rumina harmin germina tyramine
foram form forme formee forum frame