Is NINJA a valid Scrabble word?

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

What NINJA means

• noun - One trained in ninjutsu, especially one used for espionage, assassination, and other tasks requiring stealth during Japan's shogunate period.
• adjective - Fast and sneaky.
• verb - To act or move like a ninja, particularly with regard to a combination of speed, power, and stealth.

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

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