coitus vs intercourse

coitus and intercourse both are nouns.

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

As nouns, coitus and intercourse are synonyms defined as:

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

coitus (noun)	intercourse (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
	communication between individuals