Is DECKS a Wordle Word?

Yes. DECKS 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 DECKS mean?

/dɛks/

Any raised flat surface that can be walked on: a balcony; a porch; a raised patio; a flat rooftop.
The floorlike covering of the horizontal sections, or compartments, of a ship. Small vessels have only one deck; larger ships have two or three decks.“to swab the deck”
A main aeroplane surface, especially of a biplane or multiplane.

6 more noun definitions

A pack or set of playing cards.
(by extension) A set of cards owned by each individual player and from which they draw when playing.
A set of slides for a presentation.
A heap or store.
A folded paper used for distributing illicit drugs.
The floor.“We hit the deck as bullets began to fly.”

To furnish with a deck, as a vessel.
To knock someone to the floor, especially with a single punch.“Wow, did you see her deck that guy who pinched her?”
To cause a player to run out of cards to draw and usually lose the game as a result.

(sometimes with out) To dress (someone) up, to clothe with more than ordinary elegance
(sometimes with out) To decorate (something).
To cover; to overspread.

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

Starter word rating: WeakIn the top 54% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 5 of 5
Common letters: E

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