male orgasm vs climax

male orgasm and climax both are nouns.

Word	Noun	Adjective	Verb	Adverb
male orgasm	Yes	No	No	No
climax	Yes	No	Yes	No

As nouns, climax is a hypernym of male orgasm; that is, climax is a word with a broader meaning than male orgasm:

Other hypernyms of male orgasm include coming, orgasm, sexual climax.

male orgasm (noun)	climax (noun)
an orgasm accompanied by the sensation of ejaculation of semen	the moment of most intense pleasure in 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

male orgasm (verb)	climax (verb)
	end, especially to reach a final or climactic stage