Is SMOGS a Wordle Word?

Yes. SMOGS 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 SMOGS mean?

A noxious mixture of particulates and gases that is the result of urban air pollution.

To get a smog check; to check a vehicle or have it checked for emissions.“If the car is more than five years old, you'll have to have it smogged before you can register it.”

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

Starter word rating: WeakIn the top 94% of all valid Wordle words for testing common letters.
Vowels: O
Unique letters: 4 of 5Repeats S
Common letters: O

Hard-mode trap: 7 valid words fit the pattern S_OGS. 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.