Rushing is an action taken by the offense that means to advance the ball by running with it, as opposed to passing,  or kicking. 
Rushing, on offense, is running with the ball when starting from behind the line of scrimmage with an intent of gaining yardage. While this usually means a running play, any offensive play that does not involve a forward pass is a rush - also called a run. It is usually done by the running back after a handoff from the quarterback, although quarterbacks and wide receivers can also rush. The quarterback will usually run when a passing play has broken down – such as when there is no receiver open to catch the ball – and there is room to run down the field. A team with a quarterback who is fast and skilled at running may regularly call intentional running plays for that quarterback, but this is rare due to the increased risk of injury. A wide receiver can act as a rusher on several kinds of plays, such as on a reverse, on an end-around, or on a lateral pass behind the line of scrimmage, which is a type of screen pass. However, a wide receiver screen play is usually intended to be a forward pass so that if the receiver drops the ball it is an incomplete pass instead of a fumble.
A rushing attempt may also be referred to as a carry, with any yards gained referred to as rushing yards, as in "the running back had 20 carries for 100 rushing yards."
A running back (RB) is a member of the offensive backfield in gridiron football. The primary roles of a running back are to receive handoffs from the quarterback to rush the ball, to line up as a receiver to catch the ball, and block. There are usually one or two running backs on the field for a given play, depending on the offensive formation. A running back may be a halfback, a wingback or a fullback. A running back will sometimes be called a "feature back" if he is the team's starting running back.
In gridiron football, a lineman is a player who specializes in play at the line of scrimmage. The linemen of the team currently in possession of the ball are the offensive line, while linemen on the opposing team are the defensive line. A number of NFL rules specifically address restrictions and requirements for the offensive line, whose job is to help protect the quarterback from getting sacked for a loss, or worse, fumbling. The defensive line is covered by the same rules that apply to all defensive players. Linemen are usually the largest players on the field in both height and weight, since their positions usually require less running and more strength than skill positions.
A wide receiver (WR), also referred to as a wideout, formerly a split end, is an eligible receiver in gridiron football. A key skill position of the offense, it gets its name from the player being split out "wide", farthest away from the rest of the offensive formation.
A screen pass is a play in gridiron football consisting of a short pass to a receiver who is protected by a screen of blockers. During a screen pass, a number of things happen concurrently in order to fool the defense into thinking a long pass is being thrown, when in fact the pass is merely a short one, just beyond the defensive linemen. Screens are usually deployed against aggressive defenses that rush the passer. Because screens invite the defense to rush the quarterback, they are designed to leave fewer defensemen behind the rushers to stop the play.
In gridiron football, blitzing is a tactic used by the defense to disrupt pass attempts by the offense. During a blitz, a higher than usual number of defensive players will rush the opposing quarterback, in an attempt either to tackle him or force him to hurry his pass attempt.
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.
Single set back is an offensive base formation in American Football which requires only one running back lined up about five yards behind the quarterback. There are many variations on single back formations including two tight ends and two wide receivers, one tight end/three wide receivers, etc. The running back can line up directly behind the quarterback or offset either the weak side or the strong side.
The passing pocket, or the pocket, is a term used in American football to describe the area in the backfield created on a passing play where the offensive line forms a wall of protection around the quarterback. This allows him adequate time to find an open receiver and to pass the ball. The offensive line will drop back slightly, creating a U-shaped protected area for the quarterback to find an open receiver and pass the ball.
A trick play, also known as a gadget play, gimmick play or trickeration, is a play in gridiron football that uses deception and unorthodox tactics to fool the opposing team. A trick play is often risky, offering the potential for a large gain or a touchdown if it is successful, but with the chance of a significant loss of yards or a turnover if not. Trick plays are rarely used not only because of the riskiness, but also to maintain the element of surprise for when they are used.
A halfback (HB) is an offensive position in American football, whose duties involve lining up in the backfield and carrying the ball on most rushing plays, i.e. a running back. When the principal ball carrier lines up deep in the backfield, and especially when that player is placed behind another player, as in the I formation, that player is instead referred to as a tailback.
In American football, the specific role that a player takes on the field is referred to as their "position." Under the modern rules of American football, both teams are allowed 11 players on the field at one time and have "unlimited free substitutions," meaning that they may change any number of players during any "dead ball" situation. This has resulted in the development of three task-specific "platoons" of players within any single team: the offense, the defense, and the so-called 'special teams'. Within these three separate "platoons", various positions exist depending on the jobs that the players are doing.
The triple option is an American football play used to offer several ways to move the football forward on the field of play. The triple option is based on the option run, but uses three players who might run with the ball instead of the two used in a standard option run.
In American football, a play is a close-to-the-ground plan of action or strategy used to move the ball down the field. A play begins at either the snap from the center or at kickoff. Most commonly, plays occur at the snap during a down. These plays range from basic to very intricate. Football players keep a record of these plays in a playbook.
On defense in American football, rushing is charging across the line of scrimmage towards the quarterback or kicker in the effort to stop or "sack" them. The purpose is tackling, hurrying or flushing the quarterback, or blocking or disrupting a kick. In both college and professional football, getting a strong pass rush is an important skill, as even an average quarterback can be productive if he has enough time to find an open receiver, even against a good secondary. To increase pressure, teams will sometimes use a pass-rushing specialist, who is usually a quick defensive end or outside linebacker tasked with aggressively rushing the quarterback in obvious passing situations.
Total offense is a gridiron football statistic representing the total number of yards rushing and yards passing by a team or player. Total offense differs from yards from scrimmage, which gives credit for passing yardage to the person receiving the football rather than the person throwing the football.
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.
Buck-lateral is an American football play or a series of plays used in the Single-wing formation. Since the Single-Wing formation lost prominence by 1950, the football play referred to as the Buck-lateral is almost gone from football's vocabulary. However, prior to this time, the buck-lateral play gave fullbacks the option to run, lateral, or hand-off the ball to another player. Running the buck-lateral required an offensive scheme that needed the fullback to possess many specialized skills, as opposed to today's fullback who mainly blocks and carries the ball infrequently.
The run and shoot offense is an offensive system for American football which emphasizes receiver motion and on-the-fly adjustments of receivers' routes in response to different defenses. It was conceived by former high school coach Glenn "Tiger" Ellison and refined and popularized by former Portland State offensive coordinator Mouse Davis.
A route is a pattern or path that a receiver in gridiron football runs to get open for a forward pass. Routes are usually run by wide receivers, running backs and tight ends, but other positions can act as a receiver given the play.