Declivous is valid Scrabble Word

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

Definitions for DECLIVOUS in dictionary:

Words related to DECLIVOUS

steep7

Similar words containing CLIVOU without suffix s and without prefix de

acclivous16
Find what other words can be done using letters: "declivous"
https://scrabble-word.com/finder/declivous
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