obstacle

Words with a similar base: obstacle

'obstacle'

[obstacle.n.01] as in: something immaterial that stands in the way and must be circumvented or surmounted

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Examples:
lack of imagination is an obstacle to one's advancement
the poverty of a district is an obstacle to good education
the filibuster was a major obstruction to the success of their plan

'obstacle'

[obstacle.n.02] as in: an obstruction that stands in the way (and must be removed or surmounted or circumvented)