favourite vs choice

favourite and choice both are nouns.

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

As nouns, choice is a hypernym of favourite; that is, choice is a word with a broader meaning than favourite:

Other hypernyms of favourite include pick, selection.

favourite (noun)	choice (noun)
something regarded with special favor or liking	the act of choosing or selecting
a special loved one	the person or thing chosen or selected
a competitor thought likely to win	one of a number of things from which only one can be chosen

favourite (adjective)	choice (adjective)
preferred above all others and treated with partiality	of superior grade
appealing to the general public	appealing to refined taste

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