notability vs leading light

notability and leading light both are nouns.

Word	Noun	Adjective	Verb	Adverb
notability	Yes	No	No	No
leading light	Yes	No	No	No

As nouns, notability and leading light are synonyms defined as:

notability and leading light: a celebrity who is an inspiration to others

Other synonyms of notability include guiding light, luminary, notable.

notability (noun)	leading light (noun)
a celebrity who is an inspiration to others	a celebrity who is an inspiration to others