sexual congress vs copulation

sexual congress and copulation both are nouns.

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

As nouns, sexual congress and copulation are synonyms defined as:

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

sexual congress (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