If you rearrange the letters in CASE you get ACES which makes it an antonym?

Answer 1

No, an anagram. An anagram is when you can rearrange the letters in a word or phrase to form a new word or phrase. "Case" is an anagram of "aces," and "eons" is an anagram of "nose."

An antonym is the opposite of a synonym. A synonym is a word that means the same thing as another word. For example, "fret" is a synonym for "worry," "liberated" is a synonym for "emancipated," and "incensed" is a synonym for "angry."

An antonym is a word that means the opposite of another word. For example, "clean" is an antonym for "dirty," "fast" is an antonym for "slow," and "antagonism" is an antonym for "harmony."