Amalgamation

[Sonia]

The act or operation of compounding mercury with
another metal; -- applied particularly to the process of separating
gold and silver from their ores by mixing them with mercury.

[Oralee]

A [pretentious] way of saying [combination] or [blend].

[Gregory]

The action, process, or result of combining or uniting.

[Dianne]

An amalgamation is a combination of two or more companies into a new entity. Amalgamation is distinct from a merger because neither company involved survives as a legal entity.