Is PREPS a Wordle Word?

Yes. PREPS 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 PREPS mean?

/pɹɛps/

A preventative medical regiment of HIV medicines used to protect against HIV seroconversion after an exposure.“Some doctors will prescribe pre-exposure prophylaxis to promiscuous people that have a hard time controlling themselves or their condom usage to prevent them from getting AIDS.”

2 more noun definitions

Homework, work set to do outside class time, used widely in public schools and preparatory schools but not state schools.
Preparatory level; the last two levels or the fourth and fifth years of preschool; the two levels before first grade.

(grammar, strict sense) Any of a class of non-inflecting words typically employed to connect a following noun or a pronoun, in an adjectival or adverbial sense, with some other word: a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word.
A proposition; an exposition; a discourse.

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

Starter word rating: WeakIn the top 43% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 4 of 5Repeats P
Common letters: R, E

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.