Is HILTS a Wordle Word?

Yes. HILTS 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 HILTS mean?

The handle of a sword, consisting of grip, guard, and pommel, designed to facilitate use of the blade and afford protection to the hand.
The base of the penis.

To provide with a hilt.
To insert (a bodily extremity) as far as it can go into a sexual orifice so that it is impeded by the wider base to which it is attached (finger until palm, penis until pelvis).

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

Starter word rating: AverageIn the top 36% of all valid Wordle words for testing common letters.
Vowels: I
Unique letters: 5 of 5
Common letters: I, L, T

Hard-mode trap: 9 valid words fit the pattern _ILTS. 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.