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.
chillness chilliness chalones cholines shallowness shalloons
fellness illness fullness chillness tallness wellness dullness chilliness realness jowliness slyness holiness fulness jolliness foulness silliness vileness oiliness hilliness paleness lowliness wooliness woolliness millines soleness wholeness dailyness coolness maleness dulness haleness mealiness dailiness wiliness