sexual congress vs sexual intercourse

sexual congress and sexual intercourse both are nouns.

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

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

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

Other synonyms of sexual congress include carnal knowledge, coition, coitus, copulation, intercourse, relation, sex act, sexual relation.

sexual congress (noun)	sexual 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