throbbing vs pounding

throbbing and pounding both are nouns.

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

As nouns, throbbing and pounding are synonyms defined as:

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

Other synonyms of throbbing include throb.

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

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