copulation vs coition

copulation and coition both are nouns.

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

As nouns, copulation and coition are synonyms defined as:

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

copulation (noun)	coition (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