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.
quizzer queasier queazier gauzier gazer causer cosier cozier cusser kaiser kisser quasar gassier goosier guesser
fizzer quizzer whizzer buzzer fizzier fuzzier vizier jazzer jazzier muzzier rozzer seizer sizer sizier dizzier whizzier