The opposite of amateur could be professional (job, sport) or veteran (experienced person).
amateur
LaymanamateurMaybe better than amateur would be novice, or tyro. An amateur is not a professional, but may amateurs can be remarkably knowledgeable and skillful.
The opposite gender of "master" (Mr.) would be mistress(Miss).The opposite status of master could be servant, or slave.The opposite of master meaning an expert or skilled person could be novice, amateur, beginner, or trainee.
Amateur is noun (an amateur) and an adjective (amateur sports).
AmateurThe correct spelling is "amateur"
The opposite of professional is amateur.
Amateur.
amateur
The opposite of artisan: amateur - demolisher - unskilled worker
amateur
Noob Amateur or con
LaymanamateurMaybe better than amateur would be novice, or tyro. An amateur is not a professional, but may amateurs can be remarkably knowledgeable and skillful.
The opposite of having experience is inexperienced. In context, this can apply to an amateur, or novice. Similar adjectives are untrained, unsophisticated, or naive.
The opposite gender of "master" (Mr.) would be mistress(Miss).The opposite status of master could be servant, or slave.The opposite of master meaning an expert or skilled person could be novice, amateur, beginner, or trainee.
It could be, if occasional is used to mean as an amateur in a profession. The opposite of occasional would be frequent. Other opposites for career could be avocation or hobby.
Amateur is noun (an amateur) and an adjective (amateur sports).
AmateurThe correct spelling is "amateur"