Is NOILS a Wordle Word?

Yes. NOILS 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 NOILS mean?

A short fibre left over from combing wool or spinning silk during the preparation of textile yarns. Sometimes it is referred to as 'Raw Silk', although this is somewhat of a misnomer.“The silk noil was slightly nubby with random flecks in an off-white colour.”

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

Starter word rating: AverageIn the top 24% of all valid Wordle words for testing common letters.
Vowels: O, I
Unique letters: 5 of 5
Common letters: O, I, L

Hard-mode trap: 8 valid words fit the pattern _OILS. 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.