One who has an extremely high level of ability or knowledge within an area of achievement or expertise.
Someone who has previously been a master at a given lodge.
A person who supports a concept or principle.
Professional.
A prostitute.
A professional sportsman.
A chemical prophylaxis taken after sex to avoid contracting venereal disease.
An advantage of something, especially when contrasted with its disadvantages (cons).
In favor of.
Professional.