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.
fireman firman firemen foreman freeman foremen freemen ferryman foramen ferrymen fermion vermian
fireman preman choreman foreman reman wireman premen permian germane pearmain crewman foremen doorman barman wiremen merman vermian roman german juryman airman remain carman firemen quarryman dairyman ferryman firman chairman freeman choremen