climax vs sexual activity

climax and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
climax	Yes	No	Yes	No
sexual activity	Yes	No	No	No

climax (noun)	sexual activity (noun)
the moment of most intense pleasure in sexual intercourse	activities associated with sexual intercourse
the decisive moment in a novel or play
arrangement of clauses in ascending order of forcefulness
the highest point of anything conceived of as growing or developing or unfolding
the most severe stage of a disease

climax (verb)	sexual activity (verb)
end, especially to reach a final or climactic stage