Term: obstacle: an obstruction that stands in the way (and must be removed or surmounted or circumvented)
Broader: obstruction: any structure that makes progress difficult | Unrelated: cotter: a peasant farmer in the Scottish Highlands
Broader: obstruction: any structure that makes progress difficult | Unrelated: podzol: a soil that develops in temperate to cold moist climates under coniferous or heath vegetation; an organic mat over a grey leached layer
Broader: obstruction: any structure that makes progress difficult | Unrelated: amendment: a statement that is added to or revises or improves a proposal or document (a bill or constitution etc.)
Broader: obstruction: any structure that makes progress difficult | Unrelated: hue: the quality of a color as determined by its dominant wavelength
Broader: obstruction: any structure that makes progress difficult | Unrelated: kidney bean: the common bean plant grown for the beans rather than the pods (especially a variety with large red kidney-shaped beans)
Broader: obstruction: any structure that makes progress difficult | Unrelated: payment rate: the amount of money paid out per unit time
Broader: obstruction: any structure that makes progress difficult | Unrelated: reliving: a recurrence of a prior experience
Broader: obstruction: any structure that makes progress difficult | Unrelated: schoolyard: the yard associated with a school
Broader: obstruction: any structure that makes progress difficult | Unrelated: single-rotor helicopter: a helicopter having a single rotor
Broader: obstruction: any structure that makes progress difficult | Unrelated: pipit: a songbird that lives mainly on the ground in open country; has streaky brown plumage