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.
madden maiden midden madonna mueddin matin mattin median mitten matinee
bidden ridden midden sodden hodden redden shodden sudden sadden madden hidden chidden den dean maiden wooden duodena deaden hoyden louden mueddin hoiden dene laden odeon deni codein fadein redeny coden leaden hoddin dudeen widen loden deny hyoidean
mad made maid maud mayday mead meadow meadowy midday middy muddy amadou