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.
gurshes qurshes qurushes curches crushes crashes creeshes grouches grutches creches crotches crouches crutches caroches cratches caroaches carroches carritches
girshes marshes qurshes gurshes cherishes torches lurches porches rashes perches qurushes parches reshes merches marches rushees marishes arches crashes rushes parishes crushes curches birches brashes larches nourishes reshoes creeshes brushes perishes freshes searches trashes churches