pounding vs throbbing

pounding and throbbing both are nouns.

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

As nouns, pounding and throbbing are synonyms defined as:

pounding and throbbing: an instance of rapid strong pulsation (of the heart)

Other synonyms of pounding include throb.

pounding (noun)	throbbing (noun)
the act of pounding (delivering repeated heavy blows)	an instance of rapid strong pulsation (of the heart)
repeated heavy blows	a sound with a strong rhythmic beat
an instance of rapid strong pulsation (of the heart)

pounding (adjective)	throbbing (adjective)
	pounding or beating strongly or violently