Mercenaria mercenaria vs Venus

Mercenaria mercenaria and Venus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mercenaria mercenaria	Yes	No	No	No
Venus	Yes	No	No	No

Mercenaria mercenaria (noun)	Venus (noun)
an edible American clam; the heavy shells were used as money by some American Indians	type genus of the family Veneridae: genus of edible clams with thick oval shells
	the second nearest planet to the sun; it is peculiar in that its rotation is slow and retrograde (in the opposite sense of the Earth and all other planets except Uranus); it is visible from Earth as an early `morning star' or an `evening star'
	goddess of love; counterpart of Greek Aphrodite