flump vs plunk down

flump and plunk down both are verbs.

Word	Noun	Adjective	Verb	Adverb
flump	No	No	Yes	No
plunk down	No	No	Yes	No

As verbs, flump and plunk down are synonyms defined as:

flump and plunk down: set (something or oneself) down with or as if with a noise

Other synonyms of flump include plank, plonk, plop, plump, plump down, plunk.

flump (verb)	plunk down (verb)
set (something or oneself) down with or as if with a noise	set (something or oneself) down with or as if with a noise
fall heavily