Why is the word "democracy" not in the preamble of the US Constitution?

I do not say that democracy has been more pernicious on the whole, and in the long run, than monarchy or aristocracy. Democracy has never been and never can be so durable as aristocracy or monarchy; but while it lasts, it is more bloody than either.

—John Adams

Meanwhile, when the Democratic Party formed in 1828, it was with a Tory outlook keen on robbing others of their rights:

Diddy trial day 18 recap: 2nd Combs victim concludes 'humiliating' cross-examination - ABC News

—Thomas Jefferson

When the people find they can vote themselves money, that will herald the end of the republic.

—Benjamin Franklin

Can machines truly think? Can artificial intelligence surpass human intelligence, or is there an essential difference between human and machine cognition?

The republican is the only form of government which is not eternally at open or secret war with the rights of mankind.

Majority-rules democracy is the way that majorities run roughshod over minorities, destroying rights and all ideas of equality under the law. No fair-minded person wants anything to do with democracy.

To Indians: “Pack up what belongings you can carry and start walking to Oklahoma. Your fertile lands are ours now. We voted fair and square and your side lost.”

Rock Icon, 78, Hauled Off Stage in Jaw-Dropping Concert Farewell - Yahoo

Another tendency, which is extremely natural to democratic nations and extremely dangerous, is that which leads them to despise and undervalue the rights of private persons.

In other words, our Founding Fathers and other Whig intellects of that time well understood that democratic methods are the surefire means to do serious damage to the rights guaranteed under republican self-government.

To blacks: “You can’t drink from that water fountain… eat in this cafeteria… ride this bus… go to this school. We voted fair and square and your side lost.

Are the seasons in Ireland different from those in Scotland, England, and Wales? Or are they just milder versions of each other?

To slaves: “You can forget your notions of freedom. We voted fair and square and your side lost.”

Why? Try these on for size:

—Alexis de Tocqueville

Read the memo: Google cracks down on RTO mandate and offers buyouts to some US-based employees - Business Insider

[with republicanism being the rights-protecting form of governance afforded us by our Constitution]