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.
treaty treat tret tread tarty trait terret turret terete trouty tort trad trot tart drat treed tared trade dorty torta trite tarot tardy derat tired tried trout trode triad torte tyred dread trued torot dirty tarred territ derate teredo tiered toured teared triode tirade hydrate tarried deaerate
treaty fretty whereat ferrety tarty surety peart laureate great create hereat hearty heart variety ratty ready bready bratty aureate arty reata party pretty derat treat warty cherty
tare tray stray straw readier reader tyre true trey tree tore tear torah tora tire terai teary strawy strew