The difference between Rack and Sack

Rack as a noun:

A series of one or more shelves, stacked one above the other

Rack as a noun:

Any of various kinds of frame for holding clothes, bottles, animal fodder, mined ore, shot on a vessel, etc.

Rack as a noun (nautical):

A piece or frame of wood, having several sheaves, through which the running rigging passes.

Rack as a noun (nautical, slang):

A bunk.

Rack as a noun:

A distaff.

Rack as a noun:

A bar with teeth on its face or edge, to work with those of a gearwheel, pinion, or worm, which is to drive or be driven by it.

Rack as a noun:

A bar with teeth on its face or edge, to work with a pawl as a ratchet allowing movement in one direction only, used for example in a handbrake or crossbow.

Rack as a noun:

A device, incorporating a ratchet, used to torture victims by stretching them beyond their natural limits.

Rack as a noun:

A cranequin, a mechanism including a rack, pinion and pawl, providing both mechanical advantage and a ratchet, used to bend and cock a crossbow.

Rack as a noun:

A set of antlers (as on deer, moose or elk).

Rack as a noun:

A cut of meat involving several adjacent ribs.

Rack as a noun (billiards, snooker, pool):

A hollow triangle used for aligning the balls at the start of a game.

Rack as a noun (slang, vulgar):

A woman's breasts.

Rack as a noun (climbing, caving):

A friction device for abseiling, consisting of a frame with five or more metal bars, around which the rope is threaded.

Rack as a noun (climbing, slang):

A climber's set of equipment for setting up protection and belays, consisting of runners, slings, carabiners, nuts, Friends, etc.

Rack as a noun:

A grate on which bacon is laid.

Rack as a noun (obsolete):

That which is extorted; exaction.

Rack as a noun (algebra):

A set with a distributive binary operation whose result is unique.

Rack as a noun (slang):

A thousand pounds (£1,000), especially such proceeds of crime

Rack as a verb:

To place in or hang on a rack.

Rack as a verb:

To torture (someone) on the rack.

Rack as a verb:

To cause (someone) to suffer pain.

Rack as a verb (figurative):

To stretch or strain; to harass, or oppress by extortion.

Rack as a verb (billiards, snooker, pool):

To put the balls into the triangular rack and set them in place on the table.

Rack as a verb (slang):

To strike a male in the testicles.

Rack as a verb:

To (manually) load (a round of ammunition) from the magazine or belt into firing position in an automatic or semiautomatic firearm.

Rack as a verb (mining):

To wash (metals, ore, etc.) on a rack.

Rack as a verb (nautical):

To bind together, as two ropes, with cross turns of yarn, marline, etc.

Rack as a verb:

To move the slide bar on a shotgun in order to chamber the next round

Rack as a verb:

To stretch a person's joints.

Rack as a verb:

To drive; move; go forward rapidly; stir

Rack as a verb:

To fly, as vapour or broken clouds

Rack as a noun:

Thin, flying, broken clouds, or any portion of floating vapour in the sky.

Rack as a verb (brewing):

To clarify, and thereby deter further fermentation of, beer, wine or cider by draining or siphoning it from the dregs.

Rack as a verb (of a horse):

To amble fast, causing a rocking or swaying motion of the body; to pace.

Rack as a noun:

A fast amble.

Rack as a noun (obsolete):

A wreck; destruction.

Rack as a noun:

A young rabbit.

Rack as a noun:

Sack as a noun:

A bag; especially a large bag of strong, coarse material for storage and handling of various commodities, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket, a grocery sack; or, a small bag for small items, a satchel.

Sack as a noun:

The amount a sack holds; also, an archaic or historical measure of varying capacity, depending on commodity type and according to local usage; an old English measure of weight, usually of wool, equal to 13 stone (182 pounds), or in other sources, 26 stone (364 pounds).

Sack as a noun (uncountable):

The plunder and pillaging of a captured town or city.

Sack as a noun (uncountable):

Loot or booty obtained by pillage.

Sack as a noun (American football):

A successful tackle of the quarterback. See verb sense4 below.

Sack as a noun (baseball):

One of the square bases anchored at first base, second base, or third base.

Sack as a noun (informal):

Dismissal from employment, or discharge from a position, usually as give (someone) the sack or get the sack. See verb sense4 below.

Sack as a noun (colloquial, US):

Bed; usually as hit the sack or in the sack. See also sack out.

Sack as a noun (dated):

(also sacque) A kind of loose-fitting gown or dress with sleeves which hangs from the shoulders, such as a gown with a Watteau back or sack-back, fashionable in the late 17th to 18th century; or, formerly, a loose-fitting hip-length jacket, cloak or cape.

Sack as a noun (dated):

A sack coat; a kind of coat worn by men, and extending from top to bottom without a cross seam.

Sack as a noun (vulgar, slang):

The scrotum.

Sack as a verb:

To put in a sack or sacks.

Sack as a verb:

To bear or carry in a sack upon the back or the shoulders.

Sack as a verb:

To plunder or pillage, especially after capture; to obtain spoils of war from.

Sack as a verb (American football):

To tackle, usually to tackle the offensive quarterback behind the line of scrimmage before he is able to throw a pass.

Sack as a verb (informal):

To discharge from a job or position; to fire.

Sack as a verb (colloquial):

In the phrase sack out, to fall asleep. See also hit the sack.

Sack as a noun (dated):

A variety of light-colored dry wine from Spain or the Canary Islands; also, any strong white wine from southern Europe; sherry.

Sack as a noun:

Sack as a verb:

Sack as a noun: