Which of the following resources would be the most useful for a writer who is trying to determine the subtle differences in meaning between two different words?

Question

Quizplus · Accepted Answer

A dictionary is a book that shows the proper spellings and definitions of words.
Thesaurus is incorrect. A thesaurus is a book that lists words in groups of synonyms and related concepts.
Encyclopedia is incorrect. An encyclopedia is a book or set of books giving information on many subjects or on many aspects of one subject and typically arranged alphabetically.
Style guide is incorrect. A style guide is most useful for determining proper punctuation. It contains a set of standards for the writing and design of documents.

Which of the Following Resources Would Be the Most Useful