wall vs threshold

wall and threshold both are nouns.

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

wall (noun)	threshold (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	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 embankment built around a space for defensive purposes	the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
a masonry fence (as around an estate or garden)	the smallest detectable sensation
a layer of material that encloses space	a region marking a boundary
(anatomy) a layer (a lining or membrane) that encloses a structure	the starting point for a new state or experience
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)	threshold (verb)
surround with a wall in order to fortify