nookie vs sexual congress

nookie and sexual congress both are nouns.

Word	Noun	Adjective	Verb	Adverb
nookie	Yes	No	No	No
sexual congress	Yes	No	No	No

As nouns, sexual congress is a hypernym of nookie; that is, sexual congress is a word with a broader meaning than nookie:

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

nookie (noun)	sexual congress (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