banging vs thumping

banging and thumping both are nouns.

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

As adjectives, banging and thumping are synonyms defined as:

Other synonyms of banging include humongous, walloping, whopping.

banging (noun)	thumping (noun)
the act of subjecting to strong attack	a heavy dull sound (as made by impact of heavy objects)
a continuing very loud noise

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