| 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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