Is UPPER a valid Scrabble word?

Yes. UPPER is valid in Collins Scrabble Words 2024, the word list used for Scrabble in the UK.

What UPPER means

• adjective - At a higher physical position, level, rank or order.
• noun - A stimulant, such as amphetamine, that increases energy and decreases appetite.
• verb - To fix an upper onto a shoe.

Definitions come from Wiktionary via kaikki.org, shortened to fit, and are used under CC BY-SA 4.0.

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