Is WIVER a Wordle Word?

Yes. WIVER is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does WIVER mean?

Obsolete form of wyvern: A draconian creature possessing wings, only two legs and usually a barbed tail.

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: WeakIn the top 41% of all valid Wordle words for testing common letters.
Vowels: I, E
Unique letters: 5 of 5
Common letters: I, E, R

Hard-mode trap: 11 valid words fit the pattern _IVER. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.