Term: nitrous acid: an unstable inorganic acid known only in solution and as nitrite salts
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: defibrillation: treatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator)
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: hard rush: tall rush of temperate regions
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: tipster: one who sells advice about gambling or speculation (especially at the racetrack)
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: carancha: South American caracara
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: trail boss: the person responsible for driving a herd of cattle
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: upholstery needle: any of several very heavy and sometimes curved sewing needles used by upholsterers
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: vx gas: a highly lethal nerve agent used in chemical warfare; a toxic liquid that penetrates the skin or lungs to disrupt the nervous system and stop respiration; in combat VX gas is deployed by detonating a container over the target area and can persist in the environment up to several weeks after release
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: topknot: showy crest or knot of hair or feathers
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: seif dune: a long and tall sand dune with a sharp crest; common in the Sahara
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: paleographer: an archeologist skilled in paleography