Hi iconoclastic,
1. Everyone on earth use one word for America. Let us do the same with other words such as earth, water, air …. Why do we need thousands of words to refer the concepts such as them?
There have been attempts made at this.
One example is Basic English invented by Charles Ogden.
The problem is who decides which words get chosen? It comes down to the selectors personal preference which invariably will cause dissatisfaction.
One thing can be described with many words and for good reason. Take a simple example word: Excrement.
In a neutral situation one may use the word - feces, when you're angry - shit. When you hang out with cavemen - kaka. When you're on the farm - dung. When you're with the ladies at the book club - ejecta.
Each situation presents a context and an appropriate word choice. Sometimes even emotion is attached to the use of a specific word. The magnificent textures in language is what makes the argument for a reduced word catalog less than desirable.