tall vs big

tall is a noun but big is not a noun.

Word	Noun	Adjective	Verb	Adverb
tall	Yes	Yes	No	No
big	No	Yes	No	Yes

tall (noun)	big (noun)
a garment size for a tall person

tall (adjective)	big (adjective)
great in vertical dimension; high in stature	above average in size or number or quantity or magnitude or extent
impressively difficult	conspicuous in position or importance
too improbable to admit of belief	given or giving freely
lofty in style	generous and understanding and tolerant
having a specified height	marked by intense physical force
	significant
	prodigious
	serious or severe
	loud and firm
	(of animals) fully developed
	in an advanced stage of pregnancy
	feeling self-importance
	exhibiting self-importance