noncausal
adjective
non·caus·al ˌnän-ˈkȯ-zəl 
: not causal: such as
a
: not being a cause of something
causal versus noncausal actions
b
: not of, relating to, or involving causation : not marked by cause and effect
a noncausal relationship between the two events
Word History
First Known Use
1888, in the meaning defined above