throb vs thump

throb and thump both are nouns.

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

As verbs, thump is a hypernym of throb; that is, thump is a word with a broader meaning than throb:

Other hypernyms of throb include beat, pound.

throb (noun)	thump (noun)
an instance of rapid strong pulsation (of the heart)	a heavy blow with the hand
a deep pulsating type of pain	a heavy dull sound (as made by impact of heavy objects)

throb (verb)	thump (verb)
tremble convulsively, as from fear or excitement	hit hard with the hand, fist, or some heavy instrument
expand and contract rhythmically; beat rhythmically	move rhythmically
pulsate or pound with abnormal force	make a dull sound