throb vs pounding

throb and pounding both are nouns.

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

As nouns, throb and pounding are synonyms defined as:

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

Other synonyms of throb include throbbing.

throb (noun)	pounding (noun)
an instance of rapid strong pulsation (of the heart)	the act of pounding (delivering repeated heavy blows)
a deep pulsating type of pain	repeated heavy blows
	an instance of rapid strong pulsation (of the heart)

throb (verb)	pounding (verb)
tremble convulsively, as from fear or excitement
expand and contract rhythmically; beat rhythmically
pulsate or pound with abnormal force