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.
grouches grutches crouches crotches caroches crutches caroaches carroches curches creches gurshes crushes cratches qurushes carritches crashes qurshes creeshes currachs
rouches ruches grouches barouches crouches rushes riches caroches huaraches brushes caroaches carritches braches wretches birches earaches broaches brooches curches grutches larches marches marchese merches parches parritches porches searches diarchies tracheas troches crushes qurushes crutches breaches roaches retches reechoes rechews reaches ratches arches cratches breeches crotches britches creches rotches brioches carroches lurches marchesa marchesi oraches parchesi perches preaches soroches torches trochees churches