score vs get it on

score is a noun but get it on is not a noun.

Word	Noun	Adjective	Verb	Adverb
score	Yes	No	Yes	No
get it on	No	No	Yes	No

score (noun)	get it on (noun)
the act of scoring in a game or sport
a seduction culminating in sexual intercourse
a number or letter indicating quality (especially of a student's performance)
the facts about an actual situation
a written form of a musical composition; parts for different instruments appear on separate staves on large pages
a resentment strong enough to justify retaliation
a set of twenty members
grounds
a number that expresses the accomplishment of a team or an individual in a game or contest
a slight surface cut (especially a notch that is made to keep a tally)
an amount due (as at a restaurant or bar)

score (verb)	get it on (verb)
assign a grade or rank to, according to one's evaluation	have sexual intercourse with
make underscoring marks
gain points in a game
get a certain number or letter indicating quality or performance
make small marks into the surface of
induce to have sex
write a musical score for