know the score vs know what's going on

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

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

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

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

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