sexual congress vs coitus

sexual congress and coitus both are nouns.

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

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

sexual congress and coitus: 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)	coitus (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