Is MODES a Wordle Word?

Yes. MODES 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 MODES mean?

One of several ancient Greek scales.
One of several common scales in modern Western music, one of which corresponds to the modern major scale and one to the natural minor scale.
A particular means of accomplishing something.“What was the mode of entry?”

11 more noun definitions

A particular state of being, or frame of mind.“After a series of early setbacks, her political campaign is in crisis mode.”
The most frequently occurring value in a distribution
A state of a system that is represented by an eigenfunction of that system.
One of various related sets of rules for processing data; more generally, any state of the system associated with certain behaviours.“In insert mode, characters typed are directly inserted into the buffer.”
A series of settings on a device used for a specific purpose.“airplane mode; night mode”
A variation in gameplay, such as a difficulty level.
(grammar) A verb form that depends on how its containing clause relates to the speaker’s or writer’s wish, intent, or assertion about reality.
That which exists only as a quality of substance.
In lace-making, a small decorative piece inserted into a pattern.
The openwork between the solid parts of a pattern.
A woman's mantle with a hood.

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

Starter word rating: AverageIn the top 32% of all valid Wordle words for testing common letters.
Vowels: O, E
Unique letters: 5 of 5
Common letters: O, E

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