visceral pericardium vs serosa

visceral pericardium and serosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
visceral pericardium	Yes	No	No	No
serosa	Yes	No	No	No

As nouns, serosa is a hypernym of visceral pericardium; that is, serosa is a word with a broader meaning than visceral pericardium:

visceral pericardium: the innermost of the two layers of the pericardium
serosa: a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid

Other hypernyms of visceral pericardium include serous membrane.

visceral pericardium (noun)	serosa (noun)
the innermost of the two layers of the pericardium	a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid