Look it up!!!
thesaurus is the answer!
Typically, a thesaurus will have both synonyms and antonyms that you can look for.
thesaurus
Thesaurus.
An encyclopedia is designed for general information and would not have a lot of specific information about antonyms. A more appropriate reference text would be a thesaurus.
Use a thesaurus to find the words "normal" and "conventional."
Probably a thesaurus, but a dictionary may be some help!
Roget's Thesaurus Roget's Thesaurus
Thesaurus
To find the meaning of a word a dictionary would be used. If you are looking for synonyms and antonyms of a word, you would use a thesaurus. Etiquette is a noun that means the customary code of polite behavior in society or among members of a particular profession or group.
ENCYCLOPEDIA
A telephone book.