trouncing vs whacking

trouncing and whacking both are nouns.

Word	Noun	Adjective	Verb	Adverb
trouncing	Yes	No	No	No
whacking	Yes	Yes	No	Yes

As nouns, trouncing and whacking are synonyms defined as:

trouncing and whacking: the act of inflicting corporal punishment with repeated blows

Other synonyms of trouncing include beating, drubbing, lacing, licking, thrashing.

trouncing (noun)	whacking (noun)
the act of inflicting corporal punishment with repeated blows	the act of inflicting corporal punishment with repeated blows
a sound defeat

trouncing (adjective)	whacking (adjective)
	(British informal) enormous

trouncing (adverb)	whacking (adverb)
	to an abnormal extent