nooky vs coitus

nooky and coitus both are nouns.

Word	Noun	Adjective	Verb	Adverb
nooky	Yes	No	No	No
coitus	Yes	No	No	No

As nouns, coitus is a hypernym of nooky; that is, coitus is a word with a broader meaning than nooky:

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

nooky (noun)	coitus (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