Is SILKS a Wordle Word?

Yes. SILKS 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 SILKS mean?

A fine fiber excreted by the silkworm or other arthropod (such as a spider).“The thread made of silk was barely visible.”
A fine, soft cloth woven from silk fibers.
Anything which resembles silk, such as the filiform styles of the female flower of maize, or the seed covering of bombaxes.

4 more noun definitions

The gown worn by a Senior (i.e. Queen's/King's) Counsel.
A Senior (i.e. Queen's or King's) Counsel.
(circus arts, in the plural) A pair of long silk sheets suspended in the air on which a performer performs tricks.
(usually in the plural) The garments worn by a jockey displaying the colors of the horse's owner.

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

Starter word rating: WeakIn the top 87% of all valid Wordle words for testing common letters.
Vowels: I
Unique letters: 4 of 5Repeats S
Common letters: I, L

Hard-mode trap: 6 valid words fit the pattern SIL_S. 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.