You can find the word democracy in Federalist Paper #10. It talks about why the founders didn't want a democracy.

https://guides.loc.gov/federalist-papers/text-1-10#s-lg-box-wrapper-25493273

From this view of the subject it may be concluded that a pure democracy, by which I mean a society consisting of a small number of citizens, who assemble and administer the government in person, can admit of no cure for the mischiefs of faction. A common passion or interest will, in almost every case, be felt by a majority of the whole; a communication and concert result from the form of government itself; and there is nothing to check the inducements to sacrifice the weaker party or an obnoxious individual. Hence it is that such democracies have ever been spectacles of turbulence and contention; have ever been found incompatible with personal security or the rights of property; and have in general been as short in their lives as they have been violent in their deaths.

Though a republic that doesn't have fair elections isn't going to work well either.