know what's going on vs know the score

know what's going on and know the score both are verbs.

Word	Noun	Adjective	Verb	Adverb
know what's going on	No	No	Yes	No
know the score	No	No	Yes	No

As verbs, know what's going on and know the score are synonyms defined as:

Other synonyms of know what's going on include be on the ball, be with it, know what's what.

know what's going on (verb)	know the score (verb)
be well-informed	be well-informed