Heuristics is valid Scrabble Word

Is heuristics a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is heuristics valid Words with Friends?
Words with Friends YES

Definitions for HEURISTICS in dictionary:

Similar words containing HEURISTIC without suffix s

heuristic14 heuristically21
Find what other words can be done using letters: "heuristics"
https://scrabble-word.com/finder/heuristics
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