palpitate vs thump

palpitate is not a noun while thump is a noun.

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

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

Other hypernyms of palpitate include beat, pound.

palpitate (noun)	thump (noun)
	a heavy blow with the hand
	a heavy dull sound (as made by impact of heavy objects)

palpitate (verb)	thump (verb)
beat rapidly	hit hard with the hand, fist, or some heavy instrument
shake with fast, tremulous movements	move rhythmically
cause to throb or beat rapidly	make a dull sound