Yes. XIS is a valid word.
XIS is valid in the North American word list used for the Scrabble board game and other crossword tile games.
XIS is in the NASPA Word List 2023 (NWL2023), the North American list that Tileside uses for challenges and the one used in club and tournament play.
About XIS
XIS is the plural of XI, the fourteenth letter of the Greek alphabet. When XI is on the board, an S makes XIS and scores the X again, while the S can start a word running the other way. It is one of the few words that begin with X.
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XIS scores 10 points
Before any bonus squares: X 8 + I 1 + S 1 = 10. On a double-word square that's 20, on a triple-word 30, and every letter bonus under one of these tiles is applied first.
Example: XIS as the first play
Later in the game, put the X on a 3L square and XIS is worth 26 before any word bonus.
Hooks: one tile makes a new word
In front of XIS (1):
- AXISa straight line through a body or figure that satisfies certain conditions
Place that one tile so it also forms a word in the other direction and both words score.
Change one tile
Swap any one letter of XIS and these are still words:
- AISform of AI: a sloth that has three long claws on each forefoot and each hindfoot
- BIS
- CIS
- DIS
- GIS
- HIS
- KISform of KI: the circulating life energy that in Chinese philosophy is thought to be inherent in all things
- LISform of LI: Chinese distance measure
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- MISform of MI: a former British unit of length equivalent to 6,080 feet (1,853.184 meters)
- PISform of PI: the ratio of the circumference to the diameter of a circle
- QISform of QI: the vital force that in Chinese thought is inherent in all things
- SISform of SI: the syllable naming the seventh (subtonic) note of any musical scale in solmization
Same letters, other words
Memory tip
XIS is the plural of XI, the Greek letter. An easy way to add an S to an XI already on the board.
On these lists
Check words at the table, free
Tileside keeps score, checks words like this one during a challenge, tracks the tiles left in the bag and times turns. It runs in your phone's browser with no account and works offline.
Tileside checks words against the North American list, the NASPA Word List 2023. Your group's chosen dictionary always wins.
Word list: NASPA Word List 2023, used under license. NASPA Word List 2023 Edition © NASPA 2023. The copy included in this app is licensed for personal use. You may not use it for any commercial purposes.
Works with the Scrabble board game, played at the table. Tileside is an independent product, not affiliated with or endorsed by the makers of Scrabble.