Is ITEMS a Wordle Word?

Yes. ITEMS 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 ITEMS mean?

/ˈaɪtəmz/

A distinct physical object.“Tweezers are great for manipulating small items.”
(by extension) An object that can be picked up for later use.
A line of text having a legal or other meaning; a separate particular in an account.“In response to the first item, we deny all wrongdoing.”

5 more noun definitions

(psychometrics) A question on a test, which may include its answers.“The exam has 100 items, each of which includes a correct response and three distractors.”
A matter for discussion in an agenda.“The first item for discussion is the budget for next year's picnic.”
Two people who are having a relationship with each other.“Jack and Jill are an item.”
A short article in a newspaper.“an item concerning the weather”
A hint; an innuendo.

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

Starter word rating: AverageIn the top 16% of all valid Wordle words for testing common letters.
Vowels: I, E
Unique letters: 5 of 5
Common letters: I, T, E

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.