threshold vs wall

threshold and wall both are nouns.

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

threshold (noun)	wall (noun)
the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway	an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close	an embankment built around a space for defensive purposes
the smallest detectable sensation	a masonry fence (as around an estate or garden)
a region marking a boundary	a layer of material that encloses space
the starting point for a new state or experience	(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

threshold (verb)	wall (verb)
	surround with a wall in order to fortify