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