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.
sterile sterol streel stroll sutural sidereal suturally citral sudoral
sterile dariole derail quadrille laetrile material materiel nitrile waterily
steer stere stereo stria striae aster asteria ester