Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun biohazard

2 senses of biohazard

Sense 1
biohazard -- (hazard to humans or the environment resulting from biological agents or conditions)
       => health hazard -- (hazard to the health of those exposed to it)

Sense 2
biological agent, biohazard -- (any bacterium or virus or toxin that could be used in biological warfare)
       => agent -- (an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents")