Using the author's exact words without credit is called plagiarism, or copying. In the US, it is against the law. Crediting the author, or putting it into your own words is perfectly fine.
Students who use the exact words of an author are direct quoting
Verbatim means to say the exact words that were said by someone else.
Quotation marks are used to show the exact words a person said.
An exact quote would be...a quote, basically, with nothing edited, as in a quote.
exact words
Quotation marks should be used when indicating a patient's exact words on a medical record.
Words that mean "exact" include "precise" and "accurate." The corresponding nouns are precision and accuracy.
You can read the Bill of Rights' exact wording at the link below.
potato salad
quote or quotation
The lord will get pineapples
duplicate