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.
deair dear dairy deary dearie tear deer dere doer dire diary teary deray terai derry dry dor tar doughier dure tire dura taro door dore dray dorr dare dory dree dour drew tahr duro durr tier draw tiro
deair ear air nairu serai tear dear sear fear dairy mair lear rear airy bear pair terai wear weir shear fair fairy feuar near weary zaire lair teary deary pear hair wair naira chair keir leary gear heir hear hairy vair year