Spacetime is valid Scrabble Word

Is spacetime a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is spacetime valid Words with Friends?
Words with Friends YES

Definitions for SPACETIME in dictionary:

Words related to SPACETIME

spacetimes16

Words that contain SPACETIME

spacetimes16
Find what other words can be done using letters: "spacetime"
https://scrabble-word.com/finder/spacetime
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