screwing vs carnal knowledge

screwing and carnal knowledge both are nouns.

Word	Noun	Adjective	Verb	Adverb
screwing	Yes	No	No	No
carnal knowledge	Yes	No	No	No

As nouns, carnal knowledge is a hypernym of screwing; that is, carnal knowledge is a word with a broader meaning than screwing:

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

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