Rapid vs. Cataract: What's the Difference?

Moving, acting, or occurring with great speed. ]

An opacity of the crystalline lens, or of its capsule, which prevents the passage of the rays of light and impairs or destroys the sight.

Very swift or quick.

A large or high waterfall.

Steep, changing altitude quickly. (of a slope)

A great downpour; a deluge.

Needing only a brief exposure time. (of a lens, plate, film, etc.)

(Medicine) Opacity of the lens or capsule of the eye, causing impairment of vision or blindness.

Violent, severe.

(obsolete) A waterspout.

Happy.

A large waterfall; steep rapids in a river.

Rapidly.

A flood of water.

A rough section of a river or stream which is difficult to navigate due to the swift and turbulent motion of the water.

(figuratively) An overwhelming downpour or rush.

(dated) A burst of rapid fire.

(pathology) A clouding of the lens in the eye leading to a decrease in vision.

(chess) rapid chess

A great fall of water over a precipice; a large waterfall.

Very swift or quick; moving with celerity; fast; as, a rapid stream; a rapid flight; a rapid motion.

A kind of hydraulic brake for regulating the action of pumping engines and other machines; - sometimes called dashpot.

Advancing with haste or speed; speedy in progression; in quick sequence; as, rapid growth; rapid improvement; rapid recurrence; rapid succession.

Clouding of the natural lens of the eye

Quick in execution; as, a rapid penman.

A large waterfall; violent rush of water over a precipice

The part of a river where the current moves with great swiftness, but without actual waterfall or cascade; sometimes called whitewater; - usually used in the plural; as, the Lachine rapids in the St. Lawrence.

A part of a river where the current is very fast

Done or occurring in a brief period of time;

Characterized by speed; moving with or capable of moving with high speed;