Term: obstacle: an obstruction that stands in the way (and must be removed or surmounted or circumvented)
Candidate hypernym: artifact: a man-made object taken as a whole → 1
Candidate hypernym: ringer's solution: an aqueous solution containing the chlorides of sodium and potassium and calcium that is isotonic to animal tissues; used to correct dehydration and (in physiological experiments) as a medium for in vitro preparations → 0
Candidate hypernym: backache: an ache localized in the back → 0
Candidate hypernym: topper: a worker who cuts tops off (of trees or vegetables etc.) → 0
Candidate hypernym: golden pothos: evergreen liana widely cultivated for its variegated foliage → 0
Candidate hypernym: summer squash: any of various usually bushy plants producing fruit that is eaten while immature and before the rind or seeds harden → 0
Candidate hypernym: manila hemp: a kind of hemp obtained from the abaca plant in the Philippines → 0
Candidate hypernym: vector sum: a vector that is the sum of two or more other vectors → 0
Candidate hypernym: crime wave: a sudden rise in the crime rate → 0
Candidate hypernym: sphyraenidae: monotypic family of large active fishes of tropical and subtropical waters: barracuda → 0
Candidate hypernym: big science: scientific research that requires massive capital investment but is expected to yield very significant results → 0