leading light vs notability

leading light and notability both are nouns.

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

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

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

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

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