Were adjunct refers to something that was added or attached to something else. There are many synonyms that can be used in place of this phrase, such as auxiliary, appendage, attachment, supplement, or add-on. These synonyms can be used interchangeably depending on the context and the meaning that the writer intends to convey. For example, instead of saying "the book's introduction was an adjunct," one can say "the book's introduction was an attachment," or "the book's introduction was a supplement." Whether used in writing or speaking, choosing the right synonym for were adjunct can help bring more clarity and depth to one's message.