Cesium
6 lettersnounrareUpdated June 2026
Definition
A soft, silver-white, highly reactive metallic element that is liquid at near-room temperature and the most electropositive of all metals.
“Atomic clocks rely on the precise vibrations of cesium atoms to maintain accurate timekeeping.”
Pronunciation
Syllables
ce·si·um
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Synonyms
Word Game Tips
Wordle
Ends in -IUM like many elements and the CE- start with S in the middle helps narrow the options.
Scrabble
All common tiles and the M at the end provides a useful hook with the -IUM suffix completing many racks.
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Words one letter different
Change a single letter of “cesium” to make these 6-letter words — useful for Wordle and crossword clues.
Words you can make from Cesium
Shorter words formed from the letters in “cesium”.
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7-letter words you can spell by adding one letter to “cesium”.
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