darling vs favourite

darling and favourite both are nouns.

Word	Noun	Adjective	Verb	Adverb
darling	Yes	Yes	No	No
favourite	Yes	Yes	Yes	No

As nouns, darling and favourite are synonyms defined as:

Other synonyms of darling include dearie, deary, ducky, favorite, pet.

darling (noun)	favourite (noun)
a special loved one	something regarded with special favor or liking
a beloved person; used as terms of endearment	a special loved one
	a competitor thought likely to win

darling (adjective)	favourite (adjective)
dearly loved	preferred above all others and treated with partiality
	appealing to the general public

darling (verb)	favourite (verb)
	To mark an item as a personal favorite on social media