| autobus | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: bus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle |
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| broncobuster | (noun) a person who breaks horses | Synonyms: bronco buster, buster |
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| colobus | (noun) arboreal monkey of western and central Africa with long silky fur and reduced thumbs | Synonyms: colobus monkey |
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| robustness | (noun) the property of being strong and healthy in constitution | Synonyms: hardiness, lustiness |
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| (noun) the characteristic of being strong enough to withstand intellectual challenge | - |