Brownian movement
abrupt
abysmal
abyssal
advance
angular motion
ascending
ascent
axial
axial motion
back
back-flowing
backflowing
backing
backward
backward motion
bluff
bold
bottomless
breakneck
career
cavernous
climbing
collapsing
course
current
deciduous
declining
declivitous
decurrent
deep as hell
deep-sea diving
descendant
descending
descent
diving
down
down-reaching
down-trending
downcoming
downfalling
downgoing
downhill
downsinking
downward
downward motion
drift
driftage
drifting
drooping
lunging