Questions about example sentences with, and the definition and usage of "Amalgamate"

A: Amalgamate means to join or unite to form a larger organization or group, or to make separate organizations.
Example :
The electricians' union is planning to amalgamate with the technicians' union.

The different offices will be amalgamated as/into employment advice centres.

A: It's usually used when two or more organizations join together.

In my city, two of the high schools amalgamated — so they became one school.

A: verb
combine or unite to form one organization or structure.
"he amalgamated his company with another"

CHEMISTRY
alloy (a metal) with mercury.
"amalgamated zinc"

I looked it up in the dictionary (see the above). I suppose it has two meanings. I have a university graduate level English vocabulary and hadn't heard it used before in the sense of joining organizations. It sounds like it would be a synonym with merge, but only if you are talking about organizations.

A: amalgamate is to merge into a single body. powdered mix is amalgamated into water to make Kool aid. if a company called Frontier buys a company called Western, then they amalgamated Western with Frontier.
mingle is looser, simply to mix. ice cubes mingle with a drink. Western employees mingle with Frontier employees at a party

A: "Combine" is used commonly.

Native speakers rarely use "amalgamate" - the word sounds scientific (medicine, chemistry, business). It isn't used in normal conversation.

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