Noun: Antonyms refer to words that have opposite meanings compared to one another.

Example: The antonyms of "hot" include "cold" and "cool".

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Verb: When used as a verb, antonyms pertain to the act of finding opposite words.

Example: She was asked to antonym the words given in the exercise.

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Adjective: As an adjective, antonyms describe a relationship where two words have opposite meanings.

Example: "Fast" and "slow" are antonym words in the English language.

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Adverb: When used as an adverb, antonyms describe actions that are done in an opposite way.

Example: He ran away antonyms to his usual slow pace.

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