birth control pill vs sexual activity

birth control pill and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
birth control pill	Yes	No	No	No
sexual activity	Yes	No	No	No

birth control pill (noun)	sexual activity (noun)
a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception	activities associated with sexual intercourse