Is PALER a Wordle Word?

Yes. PALER 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 PALER mean?

Light in color.“I have pale yellow wallpaper.”
(of human skin) Having a pallor (a light color, especially due to sickness, shock, fright etc.).“His face turned pale after hearing about his mother's death.”
Feeble, faint.“He is but a pale shadow of his former self.”

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

Starter word rating: ExcellentIn the top 2% of all valid Wordle words for testing common letters.
Vowels: A, E
Unique letters: 5 of 5
Common letters: A, L, E, R

Hard-mode trap: 9 valid words fit the pattern PA_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.