co-occurrent
Treatments are tailored for somebody who's got co-occurring disorders, rather than a single disorder.
The two hominid species can now be shown to have co-occurred in eastern Africa for nearly half a million years.
Depression and generalized anxiety disorder cooccur at higher rates than would be expected by chance.

SMART Vocabulary: related words and phrases

Occurring and happening
afoot
asynchronous
asynchronously
attend
attendant
be at workidiom
ensuing
eventuate
fall into placeidiom
follow on
go hand in hand with somethingidiom
go off
gone
pass
resynchronize
roll
roll around
shake out
succeed
supervene