What term is define as the words an author uses in literary work which part of a style?

The term that defines the words an author uses in literary work, which is part of style, is diction.

Here's why:

* Diction refers to the author's choice of words. It encompasses the vocabulary used, the level of formality, and the specific connotations of each word.

* Style is a broader concept that includes diction, but also encompasses sentence structure, tone, rhythm, and other elements.

So, diction is a crucial element of an author's style, influencing the overall impact and meaning of the literary work.