| biohazard | (noun) any bacterium or virus or toxin that could be used in biological warfare | Synonyms: biological agent |
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| (noun) hazard to humans or the environment resulting from biological agents or conditions | - |
| haphazardness | (noun) the quality of lacking any predictable order or plan | Synonyms: noise, randomness, stochasticity |
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| hazan | (noun) the official of a synagogue who conducts the liturgical part of the service and sings or chants the prayers intended to be performed as solos | Synonyms: cantor |
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| hazard | (noun) an obstacle on a golf course | - |
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| (noun) an unknown and unpredictable phenomenon that causes an event to result one way rather than another | Synonyms: chance, fortune, luck |
| (noun) a source of danger; a possibility of incurring loss or misfortune | Synonyms: endangerment, jeopardy, peril, risk |
| hazardousness | (noun) the state of being dangerous | Synonyms: perilousness |
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| haze | (noun) confusion characterized by lack of clarity | Synonyms: daze, fog |
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| (noun) atmospheric moisture or dust or smoke that causes reduced visibility | - |
| hazel | (noun) a shade of brown that is yellowish or reddish; it is a greenish shade of brown when used to describe the color of someone's eyes | - |
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| (noun) any of several shrubs or small trees of the genus Corylus bearing edible nuts enclosed in a leafy husk | Synonyms: hazelnut, hazelnut tree |
| (noun) Australian tree grown especially for ornament and its fine-grained wood and bearing edible nuts | Synonyms: hazel tree, Pomaderris apetala |
| (noun) the fine-grained wood of a hazelnut tree (genus Corylus) and the hazel tree (Australian genus Pomaderris) | - |
| hazelnut | (noun) nut of any of several trees of the genus Corylus | Synonyms: cob, cobnut, filbert |
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| (noun) any of several shrubs or small trees of the genus Corylus bearing edible nuts enclosed in a leafy husk | Synonyms: hazel, hazelnut tree |
| hazelwood | (noun) reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture | Synonyms: red gum, satin walnut, sweet gum |
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| haziness | (noun) cloudiness resulting from haze or mist or vapor | Synonyms: mistiness, steaminess, vaporousness, vapourousness |
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| (noun) vagueness attributable to being not clearly defined | - |
| naphazoline | (noun) vasoconstrictor (trade names Privine and Sudafed) used in nasal sprays to treat symptoms of nasal congestion and in eyedrops to treat eye irritation | Synonyms: Privine, Sudafed |
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| promethazine | (noun) antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness | Synonyms: Phenergan |
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| sulfamethazine | (noun) a sulfa drug used like sulfadiazine and also in veterinary medicine | Synonyms: sulfamezathine |
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