Nouns are the most important part of speech and should stay because they are the subject of the sentence. They are found in every sentence because every sentence has a subject. Nouns can also tell person, place, or thing. So a noun can be found more then once in a sentence. So nouns need to stay because they tell us who, what, and where someone or something did or happened. If nouns do not stay then it will be hard to understand sentences.
Examples of Nouns
John Mcdonalds Kentucky desk school England Jesus He she Wendys