Expertise vs. Proficient
Difference Between Expertise and Proficient
Great skill or knowledge in a particular field or hobby.The scientist has expertise in the field of nuclear fusion.
Good at something; skilled; fluent; practiced, especially in relation to a task or skill.He was a proficient writer with an interest in human nature.
Advice, or opinion, of an expert.
skillfulness by virtue of possessing special knowledge
having or showing knowledge and skill and aptitude;adept in handicraftsan adept juggleran expert joba good mechanica practiced marksmana proficient engineera lesser-known but no less skillful composerthe effect was achieved by skillful retouching