no they are not
Antonyms are words that have pretty much opposite meanings.
No, many words have no opposite (such as "grass" or "plaster").
Antonyms
Some words do not have opposites [antonyms]. The word "such" has no antonym, unless it it used in terms of "how much". For example: She was such a sight. When used as a "how much" word, antonyms are "little" or "slight".
antonyms
antonyms
antonyms
They are antonyms.
Antonyms
Antonyms
Antonyms
No they are antonyms