big vs large

big is not a noun while large is a noun.

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

As adjectives, big and large are synonyms defined as:

big and large: above average in size or number or quantity or magnitude or extent

As adjectives, big and large are synonyms defined as:

Other synonyms of big include prominent.

As adjectives, big and large are synonyms defined as:

Other synonyms of big include magnanimous.

As adjectives, big and large are synonyms defined as:

Other synonyms of big include enceinte, expectant, gravid, great, heavy, with child.

As adverbs, big and large are synonyms defined as:

Other synonyms of big include boastfully, vauntingly.

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

big (adjective)	large (adjective)
above average in size or number or quantity or magnitude or extent	above average in size or number or quantity or magnitude or extent
conspicuous in position or importance	having broad power and range and scope
given or giving freely	conspicuous in position or importance
generous and understanding and tolerant	generous and understanding and tolerant
marked by intense physical force	in an advanced stage of pregnancy
significant	ostentatiously lofty in style
prodigious	fairly large or important in effect; influential
serious or severe
loud and firm
(of animals) fully developed
in an advanced stage of pregnancy
feeling self-importance
exhibiting self-importance

big (adverb)	large (adverb)
in a boastful manner	with the wind abaft the beam
in a major way	at a distance, wide of something (as of a mark)
on a grand scale	in a boastful manner
extremely well