Compare flump with other words:
flump vs. lump
flump vs. frump
flump vs. slump
flume vs. flump
clump vs. flump
flump vs. plump
flump vs. glump
flump vs. thump
flump vs. plunk
drop vs. flump
flump vs. sound
dull vs. flump
flump vs. heavily
fall vs. flump
flump vs. move
flump vs. thud