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