| obstacle | (noun) an obstruction that stands in the way (and must be removed or surmounted or circumvented) | - |
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| (noun) something immaterial that stands in the way and must be circumvented or surmounted | Synonyms: obstruction |
| obstetric | (adjective) of or relating to or used in or practicing obstetrics | Synonyms: obstetrical |
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| obstetrical | (adjective) of or relating to or used in or practicing obstetrics | Synonyms: obstetric |
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| obstetrician | (noun) a physician specializing in obstetrics | Synonyms: accoucheur |
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| obstetrics | (noun) the branch of medicine dealing with childbirth and care of the mother | Synonyms: midwifery, OB, tocology |
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| obstinacy | (noun) the trait of being difficult to handle or overcome | Synonyms: mulishness, obstinance, stubbornness |
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| (noun) resolute adherence to your own ideas or desires | Synonyms: bullheadedness, obstinance, pigheadedness, self-will, stubbornness |
| obstinance | (noun) the trait of being difficult to handle or overcome | Synonyms: mulishness, obstinacy, stubbornness |
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| (noun) resolute adherence to your own ideas or desires | Synonyms: bullheadedness, obstinacy, pigheadedness, self-will, stubbornness |
| obstinate | (adjective) tenaciously unwilling or marked by tenacious unwillingness to yield | Synonyms: stubborn, unregenerate |
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| (adjective) resistant to guidance or discipline | Synonyms: contrary, perverse, wayward |
| (adjective) stubbornly persistent in wrongdoing | Synonyms: cussed, obdurate, unrepentant |
| (verb) persist stubbornly | - |
| obstinately | (adverb) in a stubborn unregenerate manner | Synonyms: cussedly, mulishly, obdurately, pig-headedly, stubbornly |
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| obstipate | (verb) constipate severely | - |
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| obstipation | (noun) severe constipation resulting from an obstruction in the intestines | - |
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| obstreperous | (adjective) boisterously and noisily aggressive | - |
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| (adjective) noisily and stubbornly defiant | - |
| obstreperously | (adverb) in manner that attracts attention | Synonyms: clamorously, loudly |
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| obstreperousness | (noun) noisy defiance | - |
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| obstruct | (verb) block passage through | Synonyms: block, close up, impede, jam, obturate, occlude |
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| (verb) shut out from view or get in the way so as to hide from sight | Synonyms: block |
| (verb) hinder or prevent the progress or accomplishment of | Synonyms: block, blockade, embarrass, hinder, stymie, stymy |
| obstructed | (adjective) shut off to passage or view or hindered from action | - |
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| obstructer | (noun) any structure that makes progress difficult | Synonyms: impediment, impedimenta, obstruction, obstructor |
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| (noun) someone who systematically obstructs some action that others want to take | Synonyms: obstructionist, obstructor, resister, thwarter |
| obstruction | (noun) getting in someone's way | - |
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| (noun) the act of obstructing | - |
| (noun) any structure that makes progress difficult | Synonyms: impediment, impedimenta, obstructer, obstructor |
| (noun) something immaterial that stands in the way and must be circumvented or surmounted | Synonyms: obstacle |
| (noun) the physical condition of blocking or filling a passage with an obstruction | Synonyms: blockage |
| obstructionism | (noun) deliberate interference | - |
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| obstructionist | (noun) someone who systematically obstructs some action that others want to take | Synonyms: obstructer, obstructor, resister, thwarter |
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| obstructive | (adjective) preventing movement | Synonyms: clogging, hindering, impeding |
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| obstructively | (adverb) in an obstructive manner | Synonyms: hinderingly |
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| obstructor | (noun) any structure that makes progress difficult | Synonyms: impediment, impedimenta, obstructer, obstruction |
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| (noun) someone who systematically obstructs some action that others want to take | Synonyms: obstructer, obstructionist, resister, thwarter |
| obstruent | (noun) a consonant that is produced with a partial or complete blockage of the airflow from the lungs through the nose or mouth | - |
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