One who exceeds; a person or thing that goes beyond limits or surpasses others.
From 'exceed' + '-er' (one who). This agent noun naturally follows English word-formation patterns where verbs become 'doers' with the '-er' suffix.
An 'exceeder' is someone who breaks boundaries—it's a rare but perfect word for rule-breakers and record-setters. The suffix '-er' magically turns any verb into the person who does it.
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