Make a sentence with lots of words?

Nonsensical sentences can be created of any length. You may

• Create a dialogue within the sentence, repeatedly adding "He said, 'she said, 'he said..." and so forth.
• Add a very long string of clauses. "The dog that chased the cat the chased the mouse that chased the nut that chased the air that from behind chased the dog which chased..." which is going in a giant circle.

However, writing long sentences that can still be understood takes a lot of practice, and sentences should be no longer than is necessary to make the point. After all, a sentence is a complete thought, or possibly one or two more very closely related thoughts. It is not a laundry list.

One way to lengthen a sentence is to use a semicolon instead of a period. That glues more than one independent clause together, allowing you to pack as much in as you like. However, of course it can also limit understanding if you do it too much.

A fairly long sentence : "The formation of the United States was primarily a response by the colonists to what they viewed as repression, in the form of arbitrary and onerous regulations by the British, who, having secured unilateral dominion over much of North America, wished to continue their mercantile arrangement with their American colonies."