The difference between Ball and Football

Ball as a noun (ballistics):

A solid or hollow sphere, or part thereof. A quantity of string, thread, etc., wound into a spherical shape. A solid, spherical nonexplosive missile for a cannon, etc. # A jacketed non-expanding bullet, typically of military origin. # Such bullets collectively. #* 1659, , England's Confusion, London, p.7,[http://name.umdl.umich.edu/A69468.0001.001] #*: the Good Old Cause, which, as they seemed to represent it, smelt of Gunpowder and ball #* 1719, , , London: W. Taylor, p.294,[http://name.umdl.umich.edu/004845034.0001.000] #*: I gave each of them a Musket with a Firelock on it, and about eight Charges of Powder and Ball, charging them to be very good Husbands of both, and not to use either of them but upon urgent Occasion. #* 1803, , The History of the Maroons, London: Longman and Rees, Volume 1, Letter 5, p.148,[https://archive.org/details/cihm_44228] #*: some headstrong Maroons were using a soldier of Captain Craskell's ill, and compelling him to write to his commander, that it was too late to do any thing good, and that they wanted nothing, having got plenty of powder and ball A roundish protuberant portion of some part of the body. The front of the bottom of the foot, just behind the toes. The globe; the earthly sphere. The set of points in a metric space lying within a given distance (the radius) of a given point; specifically, the homologue of the disk in a Euclidean space of any number of dimensions. The set of points in a topological space lying within some open set containing a given point; the analogue of the disk in a Euclidean space. An object, generally spherical, used for playing games.

Ball as a noun (sport):

A round or ellipsoidal object. Any simple game involving a ball. A pitch that falls outside of the strike zone. An opportunity to launch the pinball into play. A single delivery by the bowler, six of which make up an over. A pass; a kick of the football towards a teammate.

Ball as a noun (mildly, vulgar, slang, usually in plural):

A testicle. Nonsense. Courage.

Ball as a noun (printing, historical):

A leather-covered cushion, fastened to a handle called a ballstock; formerly used by printers for inking the form, then superseded by the roller.

Ball as a noun (farriery, historical):

A large pill, a form in which medicine was given to horses; a bolus.

Ball as a verb (transitive):

To form or wind into a ball.

Ball as a verb (metalworking):

To heat in a furnace and form into balls for rolling.

Ball as a verb (transitive, vulgar):

To have sexual intercourse with.

Ball as a verb (ambitransitive):

To gather balls which cling to the feet, as of damp snow or clay; to gather into balls.

Ball as a verb (slang, usually in present participle):

To be hip or cool.

Ball as a verb (nonstandard, slang):

To play basketball.

Ball as a noun:

A formal dance.

Ball as a noun (informal):

A very enjoyable time.

Football as a noun (general):

A sport played on foot in which teams attempt to get a ball into a goal or zone defended by the other team.

Football as a noun (UK, uncountable):

Association football: a game in which two teams each contend to get a round ball into the other team's goal primarily by kicking the ball. Known as soccer in Canada, the United States, Australia, and New Zealand.

Football as a noun (US, uncountable):

American football: a game played on a field of 100 yards long and 53 1/3 yards wide in which two teams of 11 players attempt to get an ovoid ball to the end of each other's territory.

Football as a noun (Canada, uncountable):

Canadian football: a game played on a played on a field of 110 yards long and 65 yards wide in which two teams of 12 players attempt to get an ovoid ball to the end of each other's territory.

Football as a noun (Australia, Victoria, South Australia, Western Australia, Tasmania, Northern Territory, uncountable):

Australian rules football.

Football as a noun (Ireland, uncountable):

Gaelic football: a field game played with similar rules to hurling, but using hands and feet rather than a stick, and a ball, similar to, yet smaller than a soccer ball.

Football as a noun (Australia, New South Wales, Queensland, uncountable):

rugby league.

Football as a noun (Australia, Ireland, New Zealand):

rugby union.

Football as a noun (countable):

The ball used in any game called "football".

Football as a noun (uncountable):

Practice of these particular games, or techniques used in them.

Football as a noun (figuratively, countable):

An item of discussion, particularly in a back-and-forth manner

Football as a noun (slang, US, countable):

The leather briefcase containing classified nuclear war plans, which is always near the US President.