wall vs cave

wall and cave both are nouns.

Word	Noun	Adjective	Verb	Adverb
wall	Yes	No	Yes	No
cave	Yes	No	Yes	No

wall (noun)	cave (noun)
an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure	a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea
an embankment built around a space for defensive purposes
a masonry fence (as around an estate or garden)
a layer of material that encloses space
(anatomy) a layer (a lining or membrane) that encloses a structure
anything that suggests a wall in structure or function or effect
a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
a difficult or awkward situation

wall (verb)	cave (verb)
surround with a wall in order to fortify	explore natural caves
	hollow out as if making a cave or opening