runoff

As a proper noun run

is .

As a noun runoff is

that portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.

As nouns the difference between taxonomy and runoff

is that taxonomy is the science or the technique used to make a classification while runoff is that portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.

As nouns the difference between discharge and runoff

is that discharge is (uncountable) pus or exudate (other than blood) from a wound or orifice, usually due to infection or pathology while runoff is that portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.

As a verb discharge

is to accomplish or complete, as an obligation.

As nouns the difference between runoff and stream

is that runoff is that portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area while stream is a small river; a large creek; a body of moving water confined by banks.

As a verb stream is

to flow in a continuous or steady manner, like a liquid.

As nouns the difference between leak and runoff

is that leak is a crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape while runoff is that portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.

As a verb leak

is to allow fluid to escape or enter something that should be sealed.

As an adjective leak

is leaky.