orgasm vs sexual climax

orgasm and sexual climax both are nouns.

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

As nouns, orgasm and sexual climax are synonyms defined as:

orgasm and sexual climax: the moment of most intense pleasure in sexual intercourse

Other synonyms of orgasm include climax, coming.

orgasm (noun)	sexual climax (noun)
the moment of most intense pleasure in sexual intercourse	the moment of most intense pleasure in sexual intercourse