Precautional is valid Scrabble Word

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

Definitions for PRECAUTIONAL in dictionary:

Similar words containing CAUTION without suffix al and without prefix pre

caution9 cautions10 cautioned12 cautioner11 cautionry14 incaution11 recaution11 cautionary15 cautioners12 cautioning13 incautions12 precaution14 recautions12 cautionries13 overcaution16 precautions15 recautioned14 overcautions17 precautioned17 recautioning15 precautionary20 precautioning18 overcautioned19 overcautioning20
Find what other words can be done using letters: "precautional"
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