nestling vs child

nestling and child both are nouns.

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

As nouns, nestling and child are synonyms defined as:

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

nestling (noun)	child (noun)
young bird not yet fledged	a young person of either sex
a young person of either sex	a human offspring (son or daughter) of any age
	an immature childish person
	a member of a clan or tribe