Having things in common is hardly a criterion, or Diogenes would have been right that a plucked chicken is a human. Especially if it's feeding circularly on previous wrong usage. So it's more like starting calling a plucked chicken a human, and then deciding that therefore so is a shaved chimp. And then going from there to decide that so was the T Rex, etc.
Actually, the meaning is made very clear in Mussolini's Fascist Manifesto, and further clarified in his autobiography. It just means the nation above everything, united under one will and vision, without any divisions. It was in opposition to both the old conservative vs liberals division, and especially to Marxism, which divided things by class and postulated them to only exist in conflict.
As I keep saying, if I had to sum up fascism in one sentence, I haven't found a better one than Kennedy's, "Ask not what your country can do for you—ask what you can do for your country." That's it. Mussolini himself couldn't have put it better.
Germany changed that to mean "ethnic state", as in only encompassing the "Aryan Germans", if you want to classify the NSDAP as fascist, but Italian fascism was really just about Italy.
One corollary that is actually spelled out right in the manifesto is control of the industry. The industry must exist to serve the state.
Germany exemplified this in the Stakeholder Act of '37. The state was the most important stakeholder in any corporation, and had a board member with veto power on every board of directors. (That's how Messerschmidt could be forced to bear the cost and provide factory space for the Me-163 Kermit... err... Komet disaster. And that mostly happened because Milch hated Willy Messerschmidt. But Willy couldn't refuse a direct order from the state.)
Others, like authoritarianism and control of the press, are quite trivial corollaries, so I'll let them slide. You know, since otherwise you can't enforce a single undivided vision.
Everything else is extra fluff.
As an example, if you want THE prime example of a modern country that fits fascism to a T, look no further than China.