Human error
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Human error is an action that has been done but that was "not intended by the actor; not desired by a set of rules or an external observer; or that led the task or system outside its acceptable limits
A sign with a spelling mistake; the word "road" has been spelled incorrectly with a P instead of an R.
The Custom House in Dublin, which was built the wrong way around (the side facing the Liffey was intended to be the side facing Gardiner Street)[citation needed].
The "Hartlepool monkey" statue in Hartlepool, England, commemorating a monkey who was mistaken by locals to be a French soldier and killed.
Risk
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Risk is the possibility of something bad happening, comprising a level of uncertainty about the effects and implications of an activity, particularly negative and undesirable consequences.
Firefighters are exposed to risks of fire and building collapse during their work.
Harbor sign warning visitors that use of the walkway is "at your own risk"
Artist's impression of a major asteroid impact, an example of a global catastrophic risk.