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.
paleness planes pleons plainness paulins poleyns pollens plans plains pylons paulownias pillions
blueness paleness vileness maleness haleness wholeness soleness juliennes mellowness hollowness jolliness fellness hilliness oiliness lioness fallowness glueyness lenes wooliness realness silliness sullenness holiness cleanness foulness leones gluiness leanness mealiness chillness illness chilliness alienness slowness wellness coolness fullness callowness fulness lowliness lowness slyness dailiness tallness wiliness woolliness alienees sallowness plainness villainess xylenes dailyness dulness toluenes dullness oleines jowliness shallowness