missionary position vs sexual activity

missionary position and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
missionary position	Yes	No	No	No
sexual activity	Yes	No	No	No

missionary position (noun)	sexual activity (noun)
a position for sexual intercourse; a man and woman lie facing each other with the man on top; so-called because missionaries thought it the proper position for primitive peoples	activities associated with sexual intercourse