member vs sexual activity

member and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
member	Yes	No	No	No
sexual activity	Yes	No	No	No

member (noun)	sexual activity (noun)
an external body part that projects from the body	activities associated with sexual intercourse
the male sex organ
an organization that is a member of another organization (especially a state that belongs to a group of nations)
one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)
anything that belongs to a set or class