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.
hallooing halloing hullooing halloaing hollooing haloing holloing hulloing helloing hilloing haling hilloaing holloaing hulloaing hauling healing hilling helling hailing hulling hollaing holing heeling heiling howling
looing hallooing hullooing hollooing tooling siloing nielloing haloing hulloing folioing fooling halloaing halloing helloing hilloaing hilloing holloaing holloing hulloaing cooling pooling soloing shooling ling long