Subsidence

n.

1.

The act or process of subsiding. The subdual or subsidence of the more violent passions. - Bp. Warburton.

Noun	1.	subsidence - an abatement in intensity or degree (as in the manifestations of a disease); "his cancer is in remission" Synonyms: remission, remittal
	2.	subsidence - a gradual sinking to a lower level Synonyms: settling, subsiding
	3.	subsidence - the sudden collapse of something into a hollow beneath it Synonyms: cave in

abatement, hiatus, lessen, remission, remittal, reprieve, resolution, respite, subside, suspension