Is YELLS a Wordle Word?

Yes. YELLS 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 YELLS mean?

Shout; holler; make a loud sound with the voice.
To convey by shouting“He yelled directions to the party from the car.”
To tell someone off (in a loud and angry manner)“If I come home late again, my dad is gonna yell at me.”

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

Starter word rating: WeakIn the top 51% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 4 of 5Repeats L
Common letters: E, L

Hard-mode trap: 14 valid words fit the pattern _ELLS. 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.