amniotic cavity vs cavity

amniotic cavity and cavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
amniotic cavity	Yes	No	No	No
cavity	Yes	No	No	No

As nouns, cavity is a hypernym of amniotic cavity; that is, cavity is a word with a broader meaning than amniotic cavity:

amniotic cavity: the fluid-filled cavity that surrounds the developing embryo
cavity: (anatomy) a natural hollow or sinus within the body

Other hypernyms of amniotic cavity include bodily cavity, cavum.

amniotic cavity (noun)	cavity (noun)
the fluid-filled cavity that surrounds the developing embryo	(anatomy) a natural hollow or sinus within the body
	a sizeable hole (usually in the ground)
	soft decayed area in a tooth; progressive decay can lead to the death of a tooth
	space that is surrounded by something