Tacticity is valid Scrabble Word

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

9 letters word
16 points in Scrabble
17 points in WWF

Definitions for TACTICITY in dictionary:

NOUN:

the stereochemical arrangement of units in the main chain of a polymer
the stereochemical arrangement of the units in the main chain of a polymer.
quality of regularity in the arrangement of repeated units within a polymer chain

Words related to TACTICITY

tacticities15

Find what other words can be done using letters: "tacticity"
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