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.
glitter glittery glider gauleiter gladier gloater clutter clatter clattery guiltier cluttery gleetier colter kelter golder kilter gladder coulter guilder clouter quilter cloudier collider cloddier colder kultur caldera cloture clowder culture
litter glitter flitter slitter reletter fluttery plotter blatter lottery milter cluttery plottier sluttier slittier kilter flattery flatter filter blottier blotter allotter plaiter jilter platter philter flutter lotter liter politer clutter letter slotter loiter littery latter clatter gauleiter clattery glittery quilter tilter