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.
arches aurochs archaise archaize airshows
ratches earaches creches arches lurches parches brooches porches reaches crotches wretches larches breeches soroches grutches parritches britches ruches breaches broaches carroches crutches cratches marches roaches caroaches braches grouches retches barouches caroches huaraches riches crouches preaches troches churches torches oraches rotches merches birches searches perches rouches brioches curches carritches rachis marchesa brashes rashes marishes perishes parchesi marchesi trashes diarchies rechews tracheas rushes parishes trochees reshes cherishes reechoes qurushes reshoes freshes mariachis creeshes girshes aurochs marchese brachs marshes rushees crashes currachs huarachos qurshes orchis nourishes brushes crushes gurshes