As nouns the difference between pumpernickel and flump
is that pumpernickel is a type of sourdough rye bread, strongly flavored, dense, and dark in color while flump is the dull sound so produced.
As a verb flump is
to move or fall heavily, or with a dull sound.
flump
English
Verb
(
en verb)
to move or fall heavily, or with a dull sound
to drop something heavily or with a dull sound
Noun
(
en noun)
the dull sound so produced
Synonyms
* plunk, thud