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.
peeping pepping piping pipping pooping popping pupping
beeping keeping cheeping seeping jeeping wheeping weeping peeping ping kepping hyping louping copping lapping bopping roping kipping hypoing whapping reaping quipping sopping hipping fopping dapping popping wapping napping supping riping couping happing gawping tipping typing yawping yapping shipping chopping japing dipping wiping whopping whipping spaeing taping gipping topping cupping aping duping lopping zipping gapping oping coping raping pupping lipping gypping moping hoping spuing whupping piing rouping cooping peeing hooping capping sapping soaping nipping rapping mapping hopping mopping sipping pieing chapping looping pingo pepping wrapping zapping jauping pipping piping gaping knapping loping souping siping heaping leaping ripping dupping doping tapping toping tupping upping repping pooping whooping chipping shaping shopping yauping yipping