(the power or skill to do something): You seem to have lost your ability to attract clients lastly.
skill (an ability to do an activity or job well): Swimming is a useful skill.
competence (the ability to do something successfully or efficiently): Undoubtedly the work is beyond her competence.
talent (an unusual natural ability to be good at something, especially without being taught):I don’t have musical talent. Dave is a man of many talents.
capability (the ability or qualities necessary to do something well): So far my new job is well within my capabilities.