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

A perfectionist

Meticulous

The option that can be used as a one-word substitute for "a perfectionist" is meticulous.

• Meticulous means paying attention to every detail; painstaking.
• Optimist means someone who is disposed to see the best side of things.
• Ambidextrous means able to use both hands equally well.
• Omniscient means having infinite knowledge.