Term: sonic barrier: the increase in aerodynamic drag as an airplane approaches the speed of sound
Candidate hypernym: drag: the phenomenon of resistance to motion through a fluid → 1
Candidate hypernym: retrenchment: entrenchment consisting of an additional interior fortification to prolong the defense → 0
Candidate hypernym: griminess: the state of being grimy → 0
Candidate hypernym: crape myrtle: ornamental shrub from eastern India commonly planted in the southern United States → 0
Candidate hypernym: quack: the harsh sound of a duck → 0
Candidate hypernym: kiwi: fuzzy brown egg-shaped fruit with slightly tart green flesh → 0
Candidate hypernym: certainty: the state of being certain → 0
Candidate hypernym: xenicidae: alternative names for the family comprising the New Zealand wrens → 0
Candidate hypernym: augustinian hermits: a monastic order of friars established in 1256 by the Pope → 0
Candidate hypernym: stemless hymenoxys: perennial having tufted basal leaves and short leafless stalks each bearing a solitary yellow flower head; dry hillsides and plains of west central North America → 0
Candidate hypernym: ouija: a board with the alphabet on it; used with a planchette to spell out supernatural messages → 0