anal sex vs anal intercourse

anal sex and anal intercourse both are nouns.

Word	Noun	Adjective	Verb	Adverb
anal sex	Yes	No	No	No
anal intercourse	Yes	No	No	No

As nouns, anal sex and anal intercourse are synonyms defined as:

anal sex and anal intercourse: intercourse via the anus, committed by a man with a man or woman

Other synonyms of anal sex include buggery, sodomy.

anal sex (noun)	anal intercourse (noun)
intercourse via the anus, committed by a man with a man or woman	intercourse via the anus, committed by a man with a man or woman