Select the option that can be used as a one-word substitute for the given group of words.

A person having significant experience in an occupation

Veteran

The one-word substitute for "a person having significant experience in an occupation" is veteran.

• Agnostic means someone who does not believe or disbelieve in the existence of God.
• Fastidious means very particular and demanding about one's standards.
• Novice means a beginner or someone who has little experience in something.

The word veteran comes from the Latin word "veteranus," meaning "experienced in war." A veteran is someone who has had a long and distinguished career in an occupation. They have a wealth of experience and knowledge, and they are often highly respected by their peers.