Is WILLS a Wordle Word?

Yes. WILLS 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 WILLS mean?

/wɪlz/

One's independent faculty of choice; the ability to be able to exercise one's choice or intention.“Of course, man's will is often regulated by his reason.”
One's intention or decision; someone's orders or commands.“Eventually I submitted to my parents' will.”
The act of choosing to do something; a person’s conscious intent or volition.“Most creatures have a will to live.”

3 more noun definitions

Law A formal declaration of one's intent concerning the disposal of one's property and holdings after death; the legal document stating such wishes.
That which is desired; one's wish.
Desire, longing. (Now generally merged with later senses.)“He felt a great will to make a pilgrimage to the Holy Land.”

To wish, desire.
To instruct (that something be done) in one's will.
To try to make (something) happen by using one's will (intention).“All the fans were willing their team to win the game.”

1 more verb definition

To bequeath (something) to someone in one's will (legal document).“He willed his stamp collection to the local museum.”

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

Starter word rating: WeakIn the top 87% of all valid Wordle words for testing common letters.
Vowels: I
Unique letters: 4 of 5Repeats L
Common letters: I, L

Hard-mode trap: 19 valid words fit the pattern _ILLS. 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.