What is a antynem for the word was?

The word "was" is a past tense form of the verb "to be". It doesn't really have an antonym in the strict sense, because antonyms are typically words with opposite meanings.

However, depending on the context, you might consider these options:

For "was" as a state of being:

* Is: This is the present tense form of "to be".

* Will be: This refers to a future state.

* Has been: This refers to a past state that continues in the present.

For "was" as a part of a past tense verb:

* Will: This refers to a future action.

* Is: This refers to a present action.

Ultimately, the best "antonym" for "was" depends on the specific situation and what you are trying to express.