ebb

> ebb
(verb)
abate, recede, retire, subside.
decay, decline, decrease, degenerate, deteriorate, sink, wane.

> ebb
(noun)
refluence, reflux, regress, regression, retrocedence, retrocession, retrogression, return.
caducity, decay, decline, degeneration, deterioration, wane, waning.
abatement, decrease, decrement, diminution.