Is RUINS a Wordle Word?

Yes. RUINS 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 RUINS mean?

/ˈɹuː.ɪnz/

(sometimes in the plural) The remains of a destroyed or dilapidated construction, such as a house or castle.
The state of being a ruin, destroyed or decayed.“The monastery has fallen into ruin.”
Something that leads to serious trouble or destruction.“Gambling has been the ruin of many.”

3 more noun definitions

A fall or tumble.
A change that destroys or defeats something; destruction; overthrow.“the ruin of a ship or an army; the ruin of a constitution or a government; the ruin of health or hopes”
Complete financial loss; bankruptcy.

To cause the fiscal ruin of.“With all these purchases, you surely mean to ruin us!”
To destroy or make something no longer usable.“He ruined his new white slacks by accidentally spilling oil on them.”
To cause severe financial loss to; to bankrupt or drive out of business.“The crooked stockbroker's fraudulent scheme ruined dozens of victims; some investors lost their life savings and even their houses.”

5 more verb definitions

To upset or overturn the plans or progress of, or to have a disastrous effect on something.“My car breaking down just as I was on the road ruined my vacation.”
To make something less enjoyable or likeable.“I used to love that song, but being assaulted when that song was playing ruined the song for me.”
To reveal the ending of (a story); to spoil.
To fall into a state of decay.
To seduce or debauch, and thus harm the social standing of.“The young libertine was notorious for ruining local girls.”

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

Starter word rating: AverageIn the top 26% of all valid Wordle words for testing common letters.
Vowels: U, I
Unique letters: 5 of 5
Common letters: R, I

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.