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.
hairdo haired hard hardy hoard hared hired heard heired harried hayride hart herd heart horde hearty hereto heriot horrid herried hurried
hairdo weirdo aired paired mired liard credo caird laird deaired redo bird fiord fired waired tired fordo foredo wired choired yaird faired sired gird dorado tardo irid ordo lirot laired cardio virid quired ired weird hired heired haired uredo teredo weirdy chaired shaird yird
hair hairy haar hare harrow harry hear heir hire hiree hoar hoary