Is SELLS a Wordle Word?

Yes. SELLS 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 SELLS mean?

/sɛlz/

An act of selling.“This is going to be a tough sell.”
An easy task.
An imposition, a cheat; a hoax; a disappointment; anything occasioning a loss of pride or dignity.

(ditransitive) To transfer goods or provide services in exchange for money.“I'll sell you all three for a hundred dollars.”
To be sold.“The corn sold for a good price.”
To promote a product or service.

4 more verb definitions

To promote a particular viewpoint.“My boss is very old-fashioned and I'm having a lot of trouble selling the idea of working at home occasionally.”
To betray for money.
To trick, cheat, or manipulate someone.
To pretend that an opponent's blows or maneuvers are causing legitimate injury; to act.

A rope (usually for tying up cattle, but can also mean any sort of rope).“He picked up the sell from the straw-strewn barn-floor, snelly sneaked up behind her and sleekly slung it around her swire while scryingː "dee, dee ye fooking quhoreǃ".”

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

Starter word rating: WeakIn the top 77% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 3 of 5Repeats S, 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.