1. The quality or state of being noxious; harmfulness or toxicity.
Usage: Plural form of noxiousness; Abstract noun referring to the degree or instances of being harmful or poisonous

Examples

• The noxiousnesses of various industrial chemicals are well documented.
• Scientists studied the noxiousnesses of different pesticides on the ecosystem.
• The report detailed the noxiousnesses of air pollution in urban areas.
• We must consider the noxiousnesses of these substances before approving their use.
• The noxiousnesses of the fumes forced the evacuation of the building.