Type the word into the box above and press Unscramble. If it's valid, it appears at the top of the results with its Scrabble point value and a clickable definition — your answer in one line. Below it you'll also see every shorter word its letters contain, which settles the follow-up argument ("fine, but was there a better play in those tiles?") in the same search.
The modern additions make good test cases: OK and ZA both joined the official lists in 2018, and both still trigger table disputes from players whose instincts predate the update — which is exactly the situation a dictionary check exists for.
"Is it a real word?" has a precise meaning in Scrabble: is it in the list your game runs on? There are three lists that matter, and they're not the same:
The OSPD (Official Scrabble Players Dictionary, published by Merriam-Webster) is the family and school dictionary — the one sold in bookstores. It's curated for general audiences, which means it deliberately omits some words that tournament play allows.
The NASPA Word List (NWL) is the tournament authority for the United States and Canada: the OSPD's coverage plus the words it leaves out, updated on its own schedule. If you play rated club or tournament Scrabble in North America, this is your law.
Collins Scrabble Words (CSW) governs international play — the UK, most of the world, and world championships. It's substantially larger than the NWL, admitting thousands of words North American play rejects, which is why a well-traveled player's vocabulary can be simultaneously legal and illegal depending on the border.
The practical rule: family board at home → OSPD is plenty; North American club or app set to US rules → NWL; international play or UK apps → Collins. When a word passes one check and fails another, it's almost never an error — it's a list boundary, and knowing which side of it your game sits on is worth more than a hundred memorized words.
In standard North American play, a word stays on the board until someone challenges it — and the challenge must come before the next player takes their turn. The word is then checked against the official list: if it's invalid, the player who laid it takes the tiles back and loses that turn; if it's valid, the challenger loses their turn instead. That symmetric risk is the whole strategy of the phony — bluffs live in the gap between what's playable and what your opponent is confident enough to challenge. House games can soften the rule however the table agrees, but agree before the first dubious word, and let the checker above serve as the neutral judge either way.
More than a hundred two-letter words are legal in Scrabble, and learning them is the single highest-return study a casual player can do — not for their own scores, but because they unlock parallel plays, where your word lies alongside an existing one and every touching pair scores too. AA, QI, XU, ZA: none of them looks like English to the uninitiated, all of them are money on a crowded board. The Scrabble word finder covers the study strategy; the word lists for starting letters, ending letters, and letter combinations are the drill material.