Is HOSER a Wordle Word?

Yes. HOSER is a valid Wordle word.

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

What does HOSER mean?

One who operates a hose, e.g. a fire hose or a garden hose.
One that hoses, i.e. hurts (someone) badly.
A person (especially a farmer) who siphons gasoline out of a vehicle or piece of equipment.

3 more noun definitions

A person who hoses down a lake after a game of hockey, to return it to a smooth state.
A clumsy, boorish person, especially an over-eating, beer-drinking man, or a man prone to petty infractions such as taking other people's food or drinks.
A Canadian.

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

Starter word rating: GoodIn the top 6% of all valid Wordle words for testing common letters.
Vowels: O, E
Unique letters: 5 of 5
Common letters: O, E, R

Hard-mode trap: 6 valid words fit the pattern HOSE_. 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.