banging vs humongous

banging is a noun but humongous is not a noun.

Word	Noun	Adjective	Verb	Adverb
banging	Yes	Yes	No	No
humongous	No	Yes	No	No

As adjectives, banging and humongous are synonyms defined as:

Other synonyms of banging include thumping, walloping, whopping.

banging (noun)	humongous (noun)
the act of subjecting to strong attack
a continuing very loud noise

banging (adjective)	humongous (adjective)
(used informally) very large	(used informally) very large