01. consultant= 1 someone whose job is to give advice on a particular subject
e.g. a management consultant
2 British English a hospital doctor of a very high rank who has a lot of knowledge about a particular area of medicine
02. merger= noun [countable]
the joining together of two or more companies or organizations to form one larger one
e.g. merger of/between
a proposed merger between two of the largest software companies
merger with
There has been a lot of talk about a merger with another leading bank.
merger negotiations
03. acquisition= 1 [uncountable] the process by which you gain knowledge or learn a skill
the acquisition of language
2 [uncountable] the act of getting land, power, money etc
acquisition of: the acquisition of new sites for development
3 [countable] formal something that you have obtained by buying it or being given it
The Art Society is holding an exhibition of recent acquisitions.
04 venture= a new business activity that involves taking risks
business/commercial venture
joint venture (=when two companies do something together)