The difference between frog and fly
is that “frog” is a small tailless amphibian of the order Anura that typically hops and “fly” is any insect of the order Diptera; characterized by having two wings , also called true flies.
The difference between pollywog and frog
is that “pollywog” is a polliwog and “frog” is a small tailless amphibian of the order Anura that typically hops.
The difference between polliwog and frog
is that "polliwog" is a tadpole and "frog" is a small tailless amphibian of the order Anura that typically hops.
The difference between frog and lash
is that "frog" is a small tailless amphibian of the order Anura that typically hops and "lash" is the thong or braided cord of a whip, with which the blow is given.