checker
n. countablen. a person or a computer program that looks for mistakes or checks that something is correct. You might use a spell checker to fix your writing.
n. a person or tool employed to verify accuracy, quality, or compliance with specific standards. Often used in compound nouns like 'spell checker' or 'fact checker'.
I always use a spell checker before I send an email.
The grocery store hired an extra checker to help manage the long lines during the holiday rush.
While an automated grammar checker can identify surface-level errors, it often fails to grasp the subtle nuances of tone and style that a human editor would catch immediately.
From check + -er.
From Middle English cheker, aphetic from Anglo-Norman escheker (“chessboard”), from Latin scaccarium, thus ultimately morpheme-for-morpheme cognate to etymology 1.
Alteration of chequer.
Commonly appears as the second element in compound nouns to describe a specific verification function.