columnar vs column

columnar is not a noun while column is a noun.

Word	Noun	Adjective	Verb	Adverb
columnar	No	Yes	No	No
column	Yes	No	No	No

columnar (noun)	column (noun)
	(architecture) a tall vertical cylindrical structure standing upright and used to support a structure
	a vertical cylindrical structure standing alone and not supporting anything (such as a monument)
	a vertical glass tube used in column chromatography; a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form colored bands
	any tubular or pillar-like supporting structure in the body
	an article giving opinions or perspectives
	a page or text that is vertically divided
	a line of units following one after another
	a vertical array of numbers or other information
	anything that approximates the shape of a column or tower

columnar (adjective)	column (adjective)
characterized by columns
having the form of a column