Term: cavern: any large dark enclosed space
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: mackerel sky: a sky filled with rows of cirrocumulus or small altocumulus clouds
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: light middleweight: an amateur boxer who weighs no more than 156 pounds
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: fenestration: the arrangement of windows in a building
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: battle plan: plan for conducting a battle
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: protohistory: the study humans prior to the invention of writing
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: geometry: the pure mathematics of points and lines and curves and surfaces
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: stasis: inactivity resulting from a static balance between opposing forces
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: presence of mind: self-control in a crisis; ability to say or do the right thing in an emergency
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: epsom salts: (used with a singular noun) hydrated magnesium sulfate used as a laxative
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: vivarium: an indoor enclosure for keeping and raising living animals and plants and observing them under natural conditions