Is SIRUP a Wordle Word?

Yes. SIRUP is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does SIRUP mean?

Any thick liquid that has a high sugar content and which is added to or poured over food as a flavouring.“maple syrup”
(by extension) Any viscous liquid.“cough syrup”
(shortened from "syrup of figs") A wig.

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

Starter word rating: AverageIn the top 39% of all valid Wordle words for testing common letters.
Vowels: I, U
Unique letters: 5 of 5
Common letters: I, R

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.