bump vs pounding

bump and pounding both are nouns.

Word	Noun	Adjective	Verb	Adverb
bump	Yes	No	Yes	No
pounding	Yes	No	No	No

As nouns, pounding is a hyponym of bump; that is, pounding is a word with a more specific, narrower meaning than bump:

Other hyponyms of bump include jar, jolt, jounce, shock, concussion, rap, strike, tap, bang, bash, belt, knock, smash, buffeting, sideswipe, slap, smack.

bump (noun)	pounding (noun)
an impact (as from a collision)	the act of pounding (delivering repeated heavy blows)
something that bulges out or is protuberant or projects from its surroundings	repeated heavy blows
a lump on the body caused by a blow	an instance of rapid strong pulsation (of the heart)

bump (verb)	pounding (verb)
knock against with force or violence
remove or force from a position of dwelling previously occupied
to play music at loud volume
to enjoy some music greatly
dance erotically or dance with the pelvis thrust forward
come upon, as if by accident; meet with
assign to a lower position; reduce in rank