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obstacle course
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noun
a military training area having obstacles, as hurdles, ditches, and walls, that must be surmounted or crossed in succession.
Informal. an event, situation, course of action, or the like that presents many challenges or difficulties.
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Which of the following nouns has an irregular plural form?
Words nearby obstacle course
obsolesce, obsolescence, obsolescent, obsolete, obstacle, obstacle course, obstacle race, obstet., obstetric, obstetrical binder, obstetrical forceps
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022