Collocations for merger - noun

planned, possible, potential, proposed
pending (esp. AmE)
talk of a pending merger between the two companies

successful
failed
company, corporate
There has been a flurry of corporate mergers and acquisitions.

airline, bank, media, etc.
big, large, major, massive

plan
agree, agree to, approve
block, oppose
They threatened legal action to block the merger.

announce
complete

go through, happen, take place
If the merger goes through, thousands of jobs will be lost.

fail

activity
plan, proposal
discussions, negotiations, talks
agreement, deal
announcement
partner

merger between
a merger between Dynron and Energee

merger with
They completed a merger with Monsanto.