The dead zone (also known as four-down territory or no man's land) is an area on the field of gridiron football where an offense is on their opponent's side of the field, but kicking a field goal would likely be unsuccessful and punting the ball would not dramatically change field position.  The dead zone may exist anywhere from the opponent's 33 to 43-yard line, where a field goal attempt would be between 50 and 60 yards and punting the ball would likely result in a touchback (the punt bounces into the opponent's end zone and they begin their drive on their own 20-yard line resulting in a net gain of 13-23 yards on the punt).
The location and size of a football team's dead zone may vary, depending on the effective field goal range of the offensive team's kicker. A team's decision on fourth down in the dead zone whether to punt or attempt a field goal is also dependent on the game score and time remaining.  Many teams that find themselves in the dead zone prefer trying to convert a short fourth down rather than risk a missed field goal or punting the ball for minimal gain.  However, as field goal kickers in the NFL have become increasingly accurate (especially from longer distances), the dead zone on an NFL football field has been moved back.  For instance, as recent as 2013 NFL kickers were successful on 67.13% of their field goal attempts 50 yards or longer (a 50-yard field goal attempt means the offence was at their opponent's 33-yard line when attempting the field goal). 
Canadian football is a sport played in Canada in which two teams of 12 players each compete for territorial control of a field of play 110 yards (101 m) long and 65 yards (59 m) wide attempting to advance a pointed oval-shaped ball into the opposing team's scoring area.
A fumble in gridiron football occurs when a player who has possession and control of the ball loses it before being downed (tackled), scoring, or going out of bounds. By rule, it is any act other than passing, kicking, punting, or successful handing that results in loss of ball possession by a player.
A touchdown is a scoring play in gridiron football. Whether running, passing, returning a kickoff or punt, or recovering a turnover, a team scores a touchdown by advancing the ball into the opponent's end zone. In American football, a touchdown is worth six points and is followed by an extra point or two-point conversion attempt.
In gridiron football, an onside kick is a kickoff deliberately kicked short in an attempt by the kicking team to regain possession of the ball. This is in contrast with a typical kickoff, in which the kicking team kicks the ball far downfield in order to maximize the distance the receiving team has to advance the ball in order to score. The risk to the team attempting an onside kick is that if it is unsuccessful the receiving team gets the ball and usually has a much better field position than with a normal kickoff.
A down is a period in which a play transpires in gridiron football. The down is a distinguishing characteristic of the game compared to other codes of football, but is synonymous with a "tackle" in rugby league. The team in possession of the football has a limited number of downs to advance ten yards or more towards their opponent's goal line. If they fail to advance that far, possession of the ball is turned over to the other team. In most situations, if a team reaches their final down they will punt to their opponent, which forces their opponent to begin their drive from further down the field; if they are in range, they might instead attempt to score a field goal.
In American football, a touchback is a ruling which is made and signaled by an official when the ball becomes dead on or behind a team's own goal line and the opposing team gave the ball the momentum, or impetus, to travel over or across the goal line but did not have possession of the ball when it became dead. Since the 2018 season, touchbacks have also been awarded in college football on kickoffs that end in a fair catch by the receiving team between its own 25-yard line and goal line. Such impetus may be imparted by a kick, pass, fumble, or in certain instances by batting the ball. A touchback is not a play, but a result of events that may occur during a play. A touchback is the opposite of a safety with regard to impetus since a safety is scored when the ball becomes dead in a team's end zone after that team — the team whose end zone it is — caused the ball to cross the goal line.
This is a glossary of terms used in Canadian football. The Glossary of American football article also covers many terms that are also used in the Canadian version of the game.
American and Canadian football are gridiron codes of football that are very similar; both have their origins in rugby football, but some key differences exist between the two codes.
In gridiron football, a quick kick is any punt made under conditions such that the opposing team "should not" expect a punt. Typically this has been a kick from scrimmage from a formation that is, or resembles, one usually used other than for punting, or at least not resembling the one usually used for punting. Typically it will also be on some down before last down, unless done from a formation usually used for place kicking.
Strategy forms a major part of American football. Both teams plan many aspects of their plays (offense) and response to plays (defense), such as what formations they take, who they put on the field, and the roles and instructions each player are given. Throughout a game, each team adapts to the other's apparent strengths and weaknesses, trying various approaches to outmaneuver or overpower their opponent in order to win the game.
Gameplay in American football consists of a series of downs, individual plays of short duration, outside of which the ball is dead or not in play. These can be plays from scrimmage – passes, runs, punts, or field goal attempts – or free kicks such as kickoffs and fair catch kicks. Substitutions can be made between downs, which allows for a great deal of specialization as coaches choose the players best suited for each particular situation. During a play, each team should have no more than 11 players on the field, and each of them has specific tasks assigned for that specific play.
A punter (P) in gridiron football is a special teams player who receives the snapped ball directly from the line of scrimmage and then punts (kicks) the football to the opposing team so as to limit any field position advantage. This generally happens on a fourth down in American football and a third down in Canadian football. Punters may also occasionally take part in fake punts in those same situations, when they throw or run the football instead of punting.
A kickoff is a method of starting a drive in gridiron football. Additionally, it may refer to a kickoff time, the scheduled time of the first kickoff of a game. Typically, a kickoff consists of one team – the "kicking team" – kicking the ball to the opposing team – the "receiving team". The receiving team is then entitled to return the ball, i.e., attempt to advance it towards the kicking team's end zone, until the player with the ball is tackled by the kicking team, goes out of bounds, scores a touchdown, or the play is otherwise ruled dead. Kickoffs take place at the start of each half of play, the beginning of overtime in some overtime formats, and after scoring plays.
A comparison of American football and rugby union is possible because of the games' shared origins, despite their dissimilarities.
The 1965 NFL Championship Game was the 33rd championship game for the National Football League (NFL), played on January 2, 1966, at Lambeau Field in Green Bay, Wisconsin. This was the first NFL championship game played in January, televised in color, and the last one played before the Super Bowl era.
A field goal (FG) is a means of scoring in gridiron football. To score a field goal, the team in possession of the ball must place kick, or drop kick, the ball through the goal, i.e., between the uprights and over the crossbar. The entire ball must pass through the vertical plane of the goal, which is the area above the crossbar and between the uprights or, if above the uprights, between their outside edges. American football requires that a field goal must only come during a play from scrimmage while Canadian football retains open field kicks and thus field goals may be scored at any time from anywhere on the field and by any player. The vast majority of field goals, in both codes, are place kicked. Drop kicked field goals were common in the early days of gridiron football but are almost never done in modern times. In most leagues, a successful field goal awards three points.
The following terms are used in American football, both conventional and indoor. Some of these terms are also in use in Canadian football; for a list of terms unique to that code, see Glossary of Canadian football.
Field goal range is the part of the field in American football where there is a good chance that a field goal attempt will be successful.
In gridiron football, a punt is a kick performed by dropping the ball from the hands and then kicking the ball before it hits the ground. The most common use of this tactic is to punt the ball downfield to the opposing team, usually on the final down, with the hope of giving the receiving team a field position that is more advantageous to the kicking team when possession changes. The result of a typical punt, barring any penalties or extraordinary circumstances, is a first down for the receiving team. A punt is not to be confused with a drop kick, a kick after the ball hits the ground, now rare in both American and Canadian football.