coitus vs copulation

coitus and copulation both are nouns.

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

As nouns, coitus and copulation are synonyms defined as:

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

coitus (noun)	copulation (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