member vs erectile organ

member and erectile organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
member	Yes	No	No	No
erectile organ	Yes	No	No	No

As nouns, erectile organ is a hypernym of member; that is, erectile organ is a word with a broader meaning than member:

member (noun)	erectile organ (noun)
an external body part that projects from the body	an organ containing erectile tissue
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