nipper

As a verb nipped

is past tense of nip.

As a noun nipper is

one who, or that which, nips.

In obsolete terms the difference between napper and nipper

is that napper is a machine used to raise the nap on cloth while nipper is a satirist.

In lang=en terms the difference between napper and nipper

is that napper is the head while nipper is a child.

As nouns the difference between napper and nipper

is that napper is a person who takes a nap while nipper is one who, or that which, nips.

As nouns the difference between taxonomy and nipper

is that taxonomy is the science or the technique used to make a classification while nipper is one who, or that which, nips.

As nouns the difference between zipper and nipper

is that zipper is (chiefly|us|australia) a zip fastener while nipper is one who, or that which, nips.

As a verb zipper

is to close a zipper.