Conglomerate
Etymology
From Latin "conglomeratus" (rolled together into a ball), from "com-" (together) and "glomus" (a ball or clew of thread). Geologists first used it for a rock made of many pebbles cemented together — a perfect picture of unrelated parts fused into one mass. Business borrowed that image for a company assembled from diverse firms.
noun · /kun-GLOM-er-it/
A large corporation made up of several unrelated businesses under one owner.
What it names
The sprawling parent that sells you toothpaste, insurance, and movies at once, so you notice how much sits behind one roof.
Example
The snack brand turned out to be one twig of a conglomerate that also made jet engines.
Related idea
A conglomerate spans unrelated industries; a subsidiary is any single company owned by a parent, related or not. A subsidiary is one piece; a conglomerate is the deliberately diverse whole.
noun · /kun-GLOM-er-it/
A mass of varied things clustered together — including, in geology, a rock of pebbles cemented in finer material.
What it names
a jumbled aggregate.
Example
The cliff face was a conglomerate of rounded stones.
Related idea
The literal “heap of mixed things” behind the corporate sense — unrelated businesses cemented into one.