graphical vs graph

graphical is not a noun while graph is a noun.

Word	Noun	Adjective	Verb	Adverb
graphical	No	Yes	No	No
graph	Yes	No	Yes	No

graphical (noun)	graph (noun)
	a visual representation of the relations between certain quantities, represented as points, plotted with reference to a set of axes
	a visual display of information
	a written symbol that is used to represent speech

graphical (adjective)	graph (adjective)
relating to or presented by a graph
written or drawn or engraved

graphical (verb)	graph (verb)
	represent by means of a graph
	plot upon a graph