Term: back: (football) a person who plays in the backfield
Broader: physical entity: an entity that has physical existence | Unrelated: chemical defense: procedures involved in taking defensive measures against attacks using chemical agents
Broader: physical entity: an entity that has physical existence | Unrelated: fireman: play in which children pretend to put out a fire
Broader: physical entity: an entity that has physical existence | Unrelated: wagon: any of various kinds of wheeled vehicles drawn by an animal or a tractor
Broader: physical entity: an entity that has physical existence | Unrelated: nomia melanderi: a common solitary bee important for pollinating alfalfa in the western United States
Broader: physical entity: an entity that has physical existence | Unrelated: sick joke: a joke in bad taste
Broader: physical entity: an entity that has physical existence | Unrelated: staggerbush: deciduous shrub of coastal plain of the eastern United States having nodding pinkish-white flowers; poisonous to stock
Broader: physical entity: an entity that has physical existence | Unrelated: startle reflex: a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs
Broader: physical entity: an entity that has physical existence | Unrelated: statement: a nonverbal message
Broader: physical entity: an entity that has physical existence | Unrelated: apparent motion: an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
Broader: physical entity: an entity that has physical existence | Unrelated: effluent: water mixed with waste matter