At the risk of not actually answering your questions, I suggest
autological (or sometimes autologous or homological) - something that describes itself
and 'autological' is an example of its own meaning, it does describe itself.
As there are other words like 'short' or 'multisyllabic' that also describe themselves, 'autological' seems to be a word that describes the entire set, including itself
As a very different kind of word and closer in idea to 'cutthroat' is the term:
A tosspot is an archaic term for someone who, in tossing a pot, is considered a drunkard. By metonymy (or is it schenectady?), a tosspot -word-, or simply a tosspot, is a word that collapses a verb and direct object into a single word, like cutthroat, pickpocket, clambake, turncoat, and of course tosspot. So tosspot is an example of a tosspot word, the example becoming the group word, the hypernym.