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.
micra micro mikra macro mucor mucro maigre megara mocker mucker mockery muckier muggier
micra craw buckra vicar lycra micro mikra ocrea picara sacra