Bible Theasaurus

Stiff (24 instances)
Unfaltering (1 instance)
Unshakable (2 instances)
Unswerving (3 instances)
Unwavering (5 instances)

Reverse Interlinear

Strong's
Root Form
Definition
Usage
ἀτενίζω 
Atenizo 
Usage: 14

קיּם 
Qayam (Aramaic) 
Usage: 2

ἑδραῖος 
hedraios 
Usage: 3

προσκαρτερέω 
Proskartereo 
Usage: 10