downward slope

decline decrease dip drop plunge recession reduction slump spill

abatement cut declivity diminution dive downgrade dwindling ebb header incline lapse lessening plummet pratfall slant slip slope tumble

belly flop falling-off nosedive

ascent rise

climb

abatement cut decline declivity decrease descent diminution dip dive downgrade downswing downturn drop drop-off dwindling ebb header incline lapse lessening plummet plunge pratfall recession reduction skid slant slide slip slope slump spill tumble

belly flop downslide downtrend falling-off nose dive

ascent development enlargement evenness expansion growth improvement incline increase level perfection rise success upgrade