ducky vs favorite

ducky and favorite both are nouns.

Word	Noun	Adjective	Verb	Adverb
ducky	Yes	No	No	No
favorite	Yes	Yes	Yes	No

As nouns, ducky and favorite are synonyms defined as:

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

ducky (noun)	favorite (noun)
a special loved one	something regarded with special favor or liking
	a special loved one
	a competitor thought likely to win

ducky (adjective)	favorite (adjective)
	preferred above all others and treated with partiality
	appealing to the general public

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