What's the difference between seizer and seizor?

Seizer

Definition:

• (n.) One who, or that which, seizes.

Example Sentences:

• (1) These defects cause the unique seizer-triggering mechanisms operative within the epileptic nervous system but which are inactive or do not exist in normal subjects.

Seizor

Definition:

• (n.) One who seizes, or takes possession.

Example Sentences: