Is MITES a Wordle Word?

Yes. MITES 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 MITES mean?

Any of many minute arachnids which, along with the ticks, comprise subclass Acarina (aka Acari).
A small coin formerly circulated in England, rated at about a third of a farthing.
A lepton, a small coin used in Palestine in the time of Christ.

3 more noun definitions

A small weight; one twentieth of a grain.
(sometimes used adverbially) Anything very small; a minute object; a very little quantity or particle
(often used affectionately) A small or naughty person, or one you take pity on; rascal

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

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.