1. Overtime
   Halftime
2. Official time
   No time

Overtime starts in an NFL game when both teams are tied at the end of four quarters of play. The winner of the overtime coin toss can win the game with a touchdown. If they score a field goal, the other team gets an opportunity to score as well.

1. Envelope
   Pants
2. Pocket
   Jacket

Quarterbacks typically stand "in the pocket" when they are looking for a receiver to throw to. These pockets are created by the offensive linemen, to give him a safe space to throw from before defenders sniff it out.

1. Elements
   Signals
2. Commandments
   Rules

Signals come from both the offensive and defensive leaders on the field, but we most frequently associate them with the quarterback, who delivers the signals for the next play in the huddle.

1. Bowl
   Scramble
2. Hash
   Foul

Quarterbacks may have to scramble, or take off running, if a pocket collapses or he isn't able to find a receiver downfield. If a quarterback doesn't scramble, he will likely be brought down in the backfield.

1. Toning
   Roughing
2. Hitting
   Tampering

Roughing, or roughing the passer as it is sometimes known, involves getting to the quarterback after he has released the ball. This incident typically results in a 15-yard penalty against the defense.

1. Zap
   Flip
2. Snap
   Crop

The ball is snapped from the center to the quarterback on his command, signaling the start of the play. A long "snapper" may also snap a ball to the holder when instructed to do so.

1. Hashmarks
   Playmarks
2. Endmarks
   Zonemarks

Hashmarks mark an entire football field off in one-yard increments, from one end zone to the other. They're not just for decoration, however; game officials use these to help determine ball placement.

1. Icing
   Blitz
2. Zone
   Holding

A blitz occurs when one or more defenders rush to the quarterback instead of dropping back into their respective defensive roles. This type of play is used to disrupt the offense or force the quarterback to pass before he's ready.

1. Dead ball
   Timeout
2. Squib ball
   Play clock

A dead ball is what a football is called when it's not in play, such as when there is a timeout, between downs on a drive or when play has been stopped. This prevents anyone from grabbing it and attempting to score.

1. Halftime
   Two-minute warning
2. Final warning
   Overtime

The two-minute warning occurs at the end of the first half and again near the conclusion of the game, to warn teams that only two minutes of play remain. This prompts a time-out, of sorts, and typically commercials for those of us watching at home.

1. Official zone
   Neutral zone
2. Offensive zone
   Defensive zone

The neutral zone is a virtual area at the line of scrimmage where no players are allowed to be until the ball is snapped. Encroach on the neutral zone before the snap and you'll earn your team a penalty.

1. Place
   Spot
2. Dot
   Space

The "spot" is the place on the field where officials have determined that the ball should be placed. This sometimes involves using the chain crew to clarify a particularly important spot or to clarify placement.

1. An alignment
   A subscription
2. An alteration
   A substitution

Just like in basketball, teams are allowed to make substitutions in the NFL, replacing one of 11 players on the field with another player. They have a limited period of time in which to do this before the ball is snapped.

1. Passing
   Targeting
2. Aiming
   Penalizing

Targeting was added as a penalty in the NFL in recent years. It is called when a player lowers his head and proceeds to initiate a tackle helmet-first. The league says this helps prevent unnecessary injuries.

1. Turnover
   Cookie
2. Pastry
   Doughnut

A turnover occurs when the defense is able to steal the ball away from the offense, either in the form of a ball that has been fumbled and recovered or a pass that has been intercepted.

1. Blaze-up
   Hurry-up
2. Quicken-up
   Fast-up

The hurry-up offense may be run when an offense is attempting to throw a defense off its game or tire them out more quickly, since there is less time between each play. Quarterbacks will lead this more fast-paced offense.

1. Vertical
   Horizontal
2. Lateral
   Perpendicular

A lateral pass occurs when a quarterback throws the ball parallel to where he's standing or behind him to a waiting player. This is a less common type of pass in the NFL, but it does occur from time to time.

1. Right
   Down
2. Up
   Over

A "down" in football represents four attempts a team has to advance the ball 10 yards before having to relinquish it. Typically, a team will try to pick up those yards in the first, second and third downs, and then may punt on the fourth (if they can't score).

1. Tight end
   Wide receiver
2. Tailback
   Fullback

A tight end is an important role on many offenses, being able to serve in a multitude of roles including as an extra tackler on the end of the offensive line or a receiver down the field.

1. Regular crew
   Judge crew
2. Chain crew
   Official crew

The chain crew utilizes eight workers--employees of the home football team--who are connected by a chain with two posts 10 yards apart. The chain crew is responsible for helping determine where the ball should be placed.

1. Aim shot
   Chip shot
2. Bank shot
   Long shot

A chip shot field goal in the NFL simply refers to a short field goal attempt being made by a team. You may be familiar with the term, as it's also used in golf to refer to a short golf shot, usually onto the green.

1. Pick-six
   Score-six
2. Field-six
   Play-six

The term "pick-six" is used to describe a play when a player on the defensive side of the ball is able to intercept the quarterback and also run the interception back for a touchdown.

1. Goal zone
   Field zone
2. Edge zone
   End zone

The end zone is the ultimate destination for any football team, giving them the opportunity to add six points to the scoreboard and extend a lead--or catch up to the other team.

1. Catback
   Polecat
2. Wildcat
   Bobcat

The wildcat offense has grown in popularity over the years. It may be used in one or more plays on the offensive side of the ball to throw the defense off, since it can deliver the ball to the QB or directly to the running back.

1. Guards
   Pads
2. Cleats
   Grips

Pads are designed to protect sensitive areas of the NFL players' bodies, including knees, thighs and the upper body area. There is still a lot of controversy regarding how protective these pads are.

1. Muff
   Puff
2. Duff
   Scuff

Often called a "muffed punt," it is actually the interaction between the player trying to receive the ball and the ball that is "muffed." That means the player was unsuccessful in trying to gain possession of the ball.

1. Marker
   Pylon
2. Milan
   Flag

Pylons mark the four corners of the end zone in a football game. A player is considered to have scored if he has possession of the ball and touches the ball to the marker at the corners of the goal line.

1. SAC
   YAC
2. BAC
   WAC

YAC represents Yards After Catch. This stat indicates that a receiver is adept at making moves down the field to help secure more yardage after receiving the ball from the quarterback.

1. Infield
   Downfield
2. Backfield
   Outfield

The downfield is the space between where the play begins and the ultimate destination where they can earn points. This is the space in which an offense must operate in order to score.

1. Free kick
   Place kick
2. Side kick
   Zone kick

A place kick occurs when the ball is technically on the ground, as opposed to being snapped from another player. This is the type of kick you'll see to start the game or after a team scores.

1. Field goal
   Safety
2. End zone
   Touchback

A safety is a play that can earn a defense two points if they are able to tackle the offensive ball carrier behind his own goal line. A safety earned by the defense also returns the ball to the scoring team.

1. Dead ball foul
   Live ball foul
2. Encroachment
   Offside

Encroachment is what happens when a defensive player enters the neutral zone between the two teams before the ball has been snapped. Officials call this as a penalty and the play is blown dead.

1. Cornerback
   Long snapper
2. Tight end
   Holder

The long snapper sends the ball backward (and between his legs!) to the holder on kick attempts. This means you'll see him when your team is kicking an extra point or a field goal, or if you're punting to the other team.

1. Out of bounds
   Encroachment
2. Targeting
   Intentional grounding

Players are considered out of bounds if they touch a boundary line (such as on the sidelines). This signals the end of the play and teams reset for the next run or pass attempt.

1. Down judge
   Back judge
2. Field judge
   Line judge

The down judge is part of the officiating crew, which includes some of the other positions that were listed as answer options. Specifically, this role watches the line of scrimmage and guides the chain crew. You can find him or her on the field opposite the press box.