Health
The absence of disease.
Safety
The absence of risk of serious personal injury
Welfare
Access to basic facilities
Accident
An unplanned, unwanted event which leads to injury, damage or loss
Near Miss
An unplanned, unwanted event which had the potential to lead to injury, damage or loss (but did not actually do so)
Dangerous ocurrence
A specified event that may have to be reported to the relevant authority by law.
Hazard
Something with potential to cause harm
Risk
The likelihood that a hazard will cause harm, in combination with severity of injury, damage or loss that might occur.