The words "lightbulb", "goat", and "purple" are also not in that Amendment. So what? The intent was that powers not delegated to the United States are reserved to the states.
James Madison:
The powers delegated by the proposed Constitution to the Federal Government are few and defined. Those which are to remain in the State governments are numerous and indefinite. The former will be exercised principally on external objects, as war, peace, negotiation, and foreign commerce with which last the power of taxation will, for the most part, be connected. The powers reserved to the several States will extend to all the objects which, in the ordinary course of affairs, concern the lives, liberties, and properties of the people, and the internal order, improvement, and prosperity of the State.
"An inference from the doctrine that a single State has the right to secede at will from the rest is that the rest would have an equal right to secede from it; in other words, to turn it, against its will, out of its union with them."
Is he right?