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.
pore pure poor pyre pare pour pere pree prey pareu perea puree parae pareo poori pereia peerie per par pry pur pro peer parr puri prow pair pray prao pier proa peri prau pear para purr pyro hyper parry peery perry
bore fore shore wore whore tore dore sore pore ore more lore kore gore core chore yore re or