Is PIERS a Wordle Word?

Yes. PIERS is a valid Wordle word.

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

Plurals ending in S are almost never chosen as Wordle answers.

What does PIERS mean?

A raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.
A similar structure, especially at a seaside resort, used to provide entertainment.
A structure that projects tangentially from the shoreline to accommodate ships; often double-sided.

2 more noun definitions

A structure supporting the junction between two spans of a bridge.
A rectangular pillar, or similar structure, that supports an arch, wall or roof, or the hinges of a gate.

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

Starter word rating: GoodIn the top 7% 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: 7 valid words fit the pattern _IERS. 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.