trouncing vs beating

trouncing and beating both are nouns.

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

As nouns, trouncing and beating are synonyms defined as:

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

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

trouncing (noun)	beating (noun)
the act of inflicting corporal punishment with repeated blows	the act of inflicting corporal punishment with repeated blows
a sound defeat	the act of overcoming or outdoing