nestling vs nipper

nestling and nipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
nestling	Yes	No	No	No
nipper	Yes	No	No	No

As nouns, nestling and nipper are synonyms defined as:

Other synonyms of nestling include child, fry, kid, minor, shaver, small fry, tiddler, tike, tyke, youngster.

nestling (noun)	nipper (noun)
young bird not yet fledged	a grasping structure on the limb of a crustacean or other arthropods
a young person of either sex	a young person of either sex