Is SANER a Wordle Word?

Yes. SANER is a valid Wordle word.

It is on the original Wordle answer list and has not been an answer yet, so it could be a future answer.

What does SANER mean?

Being in a healthy condition; not deranged; thinking rationally.“a sane mind”
Mentally sound; possessing a rational mind; having the mental faculties in such condition as to be able to anticipate and judge the effect of one's actions in an ordinary manner.“a sane person”
Rational; reasonable; sensible.“Try to go to bed at a sane time before your exams.”

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

Starter word rating: ExcellentIn the top 1% of all valid Wordle words for testing common letters.
Vowels: A, E
Unique letters: 5 of 5
Common letters: A, E, R

Hard-mode trap: 10 valid words fit the pattern SA_ER. 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.