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.
koupreys guipures cupreous cooperies copers copras coppers coprahs keepers cuprous cuppers coppras copiers coopers kippers copperas quippers coappears copperahs capers capris gapers
preys koupreys depress spurreys sprees spores spares cypres pares peres pores prays prees presa prese press pries pyres apres guipures oppress repress cypress spires sprays sprues suppress whiprays