big vs small

big is not a noun while small is a noun.

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

big (noun)	small (noun)
	a garment size for a small person
	the slender part of the back

big (adjective)	small (adjective)
above average in size or number or quantity or magnitude or extent	limited or below average in number or quantity or magnitude or extent
conspicuous in position or importance	made to seem smaller or less (especially in worth)
given or giving freely	have fine or very small constituent particles
generous and understanding and tolerant	low or inferior in station or quality
marked by intense physical force	relatively moderate, limited, or small
significant	slight or limited; especially in degree or intensity or scope
prodigious	lowercase
serious or severe	not large but sufficient in size or amount
loud and firm	(of a voice) faint
(of animals) fully developed	(of children and animals) young, immature
in an advanced stage of pregnancy
feeling self-importance
exhibiting self-importance