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.
creeshes creches crashes crushes qurshes gurshes curches crotches crutches crouches cratches caroches qurushes caroaches carroches carritches grouches grutches
reshes freshes creeshes gurshes trashes crushes parishes creches marshes crashes qurushes qurshes brushes girshes breeches brashes rushes rushees rashes marishes nourishes perishes cherishes