The difference between Horse and Knight

Horse as a noun (zoology):

Any of several animals related to Equus ferus caballus. A hoofed mammal, of the genus Equus, often used throughout history for riding and draft work. Any current or extinct animal of the family Equidae, including the zebra or the ass. Cavalry soldiers (sometimes capitalized when referring to an official category). The chess piece representing a knight, depicted as a horse. A large and sturdy person. A timber frame shaped like a horse, which soldiers were made to ride for punishment.

Horse as a noun:

In gymnastics, a piece of equipment with a body on two or four legs, approximately four feet high, sometimes (pommel horse) with two handles on top . A frame with legs, used to support something.

Horse as a noun (nautical):

A rope stretching along a yard, upon which men stand when reefing or furling the sails; footrope. A breastband for a leadsman. An iron bar for a sheet traveller to slide upon. A jackstay.

Horse as a noun (mining):

A mass of earthy matter, or rock of the same character as the wall rock, occurring in the course of a vein, as of coal or ore; hence, to take horse (said of a vein) is to divide into branches for a distance.

Horse as a noun (slang):

The sedative, antidepressant, and anxiolytic drug morphine, chiefly when used illicitly.

Horse as a noun (US):

An informal variant of basketball in which players match shots made by their opponent(s), each miss adding a letter to the word "horse", with 5 misses spelling the whole word and eliminating a player, until only the winner is left. Also HORSE, H-O-R-S-E or H.O.R.S.E. (see ).

Horse as a noun (dated, slang, among students):

A translation or other illegitimate aid in study or examination.

Horse as a noun (dated, slang, among students):

horseplay; tomfoolery

Horse as a verb (intransitive):

To frolic, to act mischievously. (Usually followed by "around".)

Horse as a verb (transitive):

To provide with a horse.

Horse as a verb (obsolete):

To get on horseback.

Horse as a verb:

To sit astride of; to bestride.

Horse as a verb (of a male horse):

To copulate with (a mare).

Horse as a verb:

To take or carry on the back.

Horse as a verb:

To place on the back of another person, or on a wooden horse, etc., to be flogged; to subject to such punishment.

Horse as a noun (uncountable, slang):

Heroin .

Knight as a noun:

A warrior, especially of the Middle Ages.

Knight as a noun:

A young servant or follower; a military attendant.

Knight as a noun:

Nowadays, a person on whom a knighthood has been conferred by a monarch.

Knight as a noun (chess):

A chess piece, often in the shape of a horse's head, that is moved two squares in one direction and one at right angles to that direction in a single move, leaping over any intervening pieces.

Knight as a noun (card games, dated):

A playing card bearing the figure of a knight; the knave or jack.

Knight as a verb (transitive):

To confer knighthood upon.

Knight as a verb (chess, transitive):

To promote (a pawn) to a knight.