tentorium vs plica

tentorium and plica both are nouns.

Word	Noun	Adjective	Verb	Adverb
tentorium	Yes	No	No	No
plica	Yes	No	No	No

As nouns, plica is a hypernym of tentorium; that is, plica is a word with a broader meaning than tentorium:

tentorium: (anatomy) a fold of dura mater that covers the cerebellum and supports the occipital lobes of the cerebrum
plica: a folded part (as in skin or muscle)

Other hypernyms of tentorium include fold.

tentorium (noun)	plica (noun)
(anatomy) a fold of dura mater that covers the cerebellum and supports the occipital lobes of the cerebrum	a folded part (as in skin or muscle)