descending
down
downwards
Dow
adown
ascending
axial
back
back-flowing
backward
below
collapsing
deciduous
declining
declivitous
declivous
decurrent
dejected
depressed
descendant
down south
down-reaching
down-trending
downcoming
downfalling
downgoing
downgrade
downhill
downline
downright
downsinking
downstairs
downstream
downstreet
downtown
downwith
drifting
drooping
dropping
falling
flowing
fluent
flying
going
gyrational
gyratory
mounting
on the descendant
on the downgrade
passing
abrupt
fast
forward
gradual
next
slow
smooth
steep
straight
upward
vertical