kid vs nestling

kid and nestling both are nouns.

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

As nouns, kid and nestling are synonyms defined as:

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

kid (noun)	nestling (noun)
young goat	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
soft smooth leather from the hide of a young goat

kid (verb)	nestling (verb)
be silly or tease one another
tell false information to for fun