biohazard

As nouns the difference between biohazard and radioactivity

is that biohazard is a biological hazard; a source of risk due to some biological factor such as bacteria or human waste while radioactivity is spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.

As a noun biohazard

is a biological hazard; a source of risk due to some biological factor such as bacteria or human waste.

As an adjective radioactive is

exhibiting radioactivity.

As a noun biohazard

is a biological hazard; a source of risk due to some biological factor such as bacteria or human waste.

As an adjective toxic is

having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.

As a noun biohazard

is a biological hazard; a source of risk due to some biological factor such as bacteria or human waste.

As an adjective biohazardous is

constituting a biohazard.

As nouns the difference between biohazard and biocontainment

is that biohazard is a biological hazard; a source of risk due to some biological factor such as bacteria or human waste while biocontainment is (biology) any of several techniques used to ensure that biohazards are contained within a laboratory and not allowed to escape into the environment.