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.
quasar queasier caesar queazier gazar causer cusser gasser kaiser gassier guesser quizzer causerie
quasar caesar tussar teaser raser osar maser maiasaur leaser lazar laser gazar hussar sari bazar bazaar baser soar sear pessary rosary tsar chaser
quasi quass quassia quais quays queasy queazy aquas quacks quaggas quags quakes oquassa squaws ukase