smokestack

As nouns the difference between exhaust and smokestack

is that exhaust is a system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system while smokestack is a conduit or group of conduits atop a structure allowing smoke to flow out.

As a verb exhaust

is to draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation.

As an adjective exhaust

is (obsolete) exhausted; used up.

As nouns the difference between funnel and smokestack

is that funnel is a utensil of the shape of an inverted hollow cone, terminating below in a pipe, and used for conveying liquids etc. into a close vessel; a tunnel while smokestack is a conduit or group of conduits atop a structure allowing smoke to flow out.

As a verb funnel

is to use a funnel.

As nouns the difference between taxonomy and smokestack

is that taxonomy is the science or the technique used to make a classification while smokestack is a conduit or group of conduits atop a structure allowing smoke to flow out.