plop vs set down

plop is a noun but set down is not a noun.

Word	Noun	Adjective	Verb	Adverb
plop	Yes	No	Yes	Yes
set down	No	No	Yes	No

As verbs, set down is a hypernym of plop; that is, set down is a word with a broader meaning than plop:

Other hypernyms of plop include place down, put down.

plop (noun)	set down (noun)
the noise of a rounded object dropping into a liquid without a splash

plop (verb)	set down (verb)
set (something or oneself) down with or as if with a noise	put down in writing; of texts, musical compositions, etc.
drop with the sound of something falling into water	remove (cargo, people, etc.) from and leave
drop something with a plopping sound	put or settle into a position
	cause to sit or seat or be in a settled position or place
	go ashore
	reach or come to rest

plop (adverb)	set down (adverb)
with a short hollow thud