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.
oraches orchis orishas
roaches breaches broaches reaches caroaches preaches braches oraches earaches huaraches arches parches curches creches carroches crashes rashes currachs grutches barouches retches porches britches grouches crotches marches marchese larches parchesi ruches cratches crouches wretches trashes crutches troches lurches reechoes birches rotches brachs marchesa marchesi caroches rouches mariachis merches riches brashes brioches perches soroches torches brooches breeches huarachos rechews ratches rachis parritches searches diarchies tracheas trochees carritches churches