Is SITES a Wordle Word?

Yes. SITES 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 SITES mean?

/saɪts/

The place where anything is fixed; situation; local position“the site of a city or of a house”
A place fitted or chosen for any certain permanent use or occupation“a site for a church”
The posture or position of a thing.

5 more noun definitions

A computer installation, particularly one associated with an intranet or internet service or telecommunications.
A website.
A category together with a choice of Grothendieck topology.
Region of a protein, a piece of DNA or RNA where chemical reactions take place.
A part of the body which has been operated on.

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

Starter word rating: AverageIn the top 34% of all valid Wordle words for testing common letters.
Vowels: I, E
Unique letters: 4 of 5Repeats S
Common letters: I, T, E

Hard-mode trap: 12 valid words fit the pattern _ITES. 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.