Which reference material would you use to find synonyms or antonyms?
Which reference material would you use to learn the word’s meaning, pronunciation, or origin?
What reference material would you use that is located in the back of a book to learn the meaning of technical vocabulary?
To find synonyms or antonyms, a thesaurus would be the appropriate reference material.
To learn a word's meaning, pronunciation, or origin, a dictionary would be the most suitable reference material.
The reference material located in the back of a book to learn the meaning of technical vocabulary is typically called a glossary or an index.