Collocations for litigation - noun

costly, expensive
endless, lengthy, protracted
complex
potential, threatened
pending
ongoing
subsequent
civil, commercial, criminal
federal
private
class-action (AmE)
the class-action litigation brought by the families of the victims

liability (esp. AmE), malpractice, tort (AmE)
the fear of medical malpractice litigation

employment, medical

bring, conduct (BrE), file (esp. AmE), initiate, pursue
the right to conduct litigation
The alleged victims have elected to pursue litigation.

engage in
become involved in, get involved in
be engaged in, be involved in
threaten
end, settle
avoid
The payment was made to avoid threatened litigation.

costs, expenses
settlement (esp. AmE)
finance (AmE)

litigation against
He engaged in endless litigation against the media.

litigation between
litigation between private parties

litigation over
litigation over water rights

the conduct of litigation (esp. BrE)
the defendant's conduct of the litigation

the cost of litigation
the risk of litigation, the threat of litigation