The words adept and expert are synonyms, but do differ in nuance. Specifically, adept implies special aptitude as well as proficiency. // adept at...

While the synonyms proficient and expert are close in meaning, proficient implies a thorough competence derived from training and practice. // prof...

Although the words skilled and expert have much in common, skilled stresses mastery of technique. // a skilled surgeon

In some situations, the words skillful and expert are roughly equivalent. However, skillful implies individual dexterity in execution or performanc...