Excretion
Part of speech: noun
Definition: The process of removing or ejecting material that has no further utility, especially from the body; the act of excreting. Something being excreted in that manner.
Evacuation
Part of speech: noun
Definition: The act of emptying, clearing of the contents, or discharging.Withdrawal of troops or civils from a town, fortress, etc.Voidance of any matter by the natural passages of the body or by an artificial opening; defecation; also, a diminution of the fluids of an animal body by cathartics, venesection, or other means.That which is evacuated or discharged; especially, a discharge by stool or other natural means.Abolition; nullification.
Example sentence: The sea from Dunkirk to Dover during these days of the evacuation looked like any coastal road in England on a bank holiday. It was solid with shipping.