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.
midday middy muddy mid mayday midi mity maid media meaty moody matey mediae moiety meadowy miaoued mad mat med mod mud
midday day chuddah waddy today duddy daddy ruddy paddy neddy middy mayday kiddy keddah cuddy caddy heyday giddy fuddy faddy eddy buddy biddy baddy muddy noddy payday soddy didy teddy toddy widdy shoddy