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.
knarred gnarred neared nard narrate nereid nerd nurd nerdy norite neuroid
barred warred parred jarred gnarred garred charred knarred marred tarred quarried herried neared birred burred bared curried pared erred haired ferried wearied carried oared hared barret cared aired chared paired married waired wherried whirried parried churred sheared wared tiaraed garret tared tarried reared jerreed curred chaired berried geared faired hurried varied rared dared eared feared laired caried whirred furred roared shirred shared chirred fared harried seared serried deaired soared teared worried purred yirred red
knarry knar gnarr knaur narrow kinara