Term: knuckleball: a baseball pitch thrown with little speed or spin
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: workhouse: a poorhouse where able-bodied poor are compelled to labor
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: mali franc: the basic unit of money in Mali
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: plainsong: a liturgical chant of the Roman Catholic Church
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: brig: two-masted sailing vessel square-rigged on both masts
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: frankenstein: an agency that escapes control and destroys its creator
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: glen: a narrow secluded valley (in the mountains)
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: coal tar: a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: dryad: a deity or nymph of the woods
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: jointer: a long carpenter's plane used to shape the edges of boards so they will fit together
Broader: abstraction: a general concept formed by extracting common features from specific examples | Unrelated: pericarp: the ripened and variously modified walls of a plant ovary