sexual intercourse vs carnal knowledge

sexual intercourse and carnal knowledge both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexual intercourse	Yes	No	No	No
carnal knowledge	Yes	No	No	No

As nouns, sexual intercourse and carnal knowledge are synonyms defined as:

sexual intercourse and carnal knowledge: sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur

Other synonyms of sexual intercourse include coition, coitus, copulation, intercourse, relation, sex act, sexual congress, sexual relation.

sexual intercourse (noun)	carnal knowledge (noun)
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur	sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur