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.
wore whore wire were ware worry where wooer war wair waur wear wary whir weer weir wiry weary whirr wirra
bore fore shore wore whore tore dore sore pore ore more lore kore gore core chore yore re or