orphan vs nestling

orphan and nestling both are nouns.

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

As nouns, nestling is a hypernym of orphan; that is, nestling is a word with a broader meaning than orphan:

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

orphan (noun)	nestling (noun)
a young animal without a mother	young bird not yet fledged
the first line of a paragraph that is set as the last line of a page or column	a young person of either sex
a child who has lost both parents
someone or something who lacks support or care or supervision

orphan (verb)	nestling (verb)
deprive of parents