Difference between Amateur and Unprofessional

AMATEUR vs UNPROFESSIONAL: NOUN

Someone who pursues a study or sport as a pastime
One who engages in an art, science, study, or athletic activity as a pastime rather than as a profession.
An athlete who has never accepted money, or who accepts money under restrictions specified by a regulatory body, for participating in a competition.
One lacking the skill of a professional, as in an art.
One who admires; an admirer; a lover.
One who has an especial love for any art, study, or pursuit, but does not practise it.
Most commonly, one who cultivates any study or art from taste or attachment, without pursuing it professionally or with a view to gain: often used of one who pursues a study or an art in a desultory, unskilful, or non-professional way.
Specifically, in sporting and athletics, an athlete who has never competed in a match open to all comers, or for a stake, or for public money, or for gate-money, or under a false name, or with a professional for a prize, and has never taught or pursued athletic exercises as a means of support.
A person attached to a particular pursuit, study, or science as to music or painting; esp. one who cultivates any study or art, from taste or attachment, without pursuing it professionally.
A lover of something.
Someone who is unqualified or insufficiently skillful.
An athlete who does not play for pay
Does not play for pay

Pertaining to or having the character of an amateur: as, amateur work; an amateur pianist.

Not befitting a certain profession or a member of a profession; not in keeping with the rules of a certain profession: as, unprofessional conduct.
Not belonging to a profession: as, an unprofessional man.
Not pertaining to one's profession.

Footage, Gamer, Grassroots, Dilettante, Dabbler, Enthusiast, Rookie, Beginner, Hobby, Unpaid, Unprofessional, Inexpert, Recreational, Unskilled, Nonprofessional

Unethical, Unbecoming, Discourteous, Disrespectful, Lay, Vocational, Occupational, Career, Nonprofessional, Untrained, Professional, Amateur, Unskilled, Inexpert, Amateurish

Ham, Footage, Grassroots, Dilettante, Dabbler, Enthusiast, Rookie, Beginner, Hobby, Unpaid, Unprofessional, Inexpert, Recreational, Unskilled, Nonprofessional

Unethical, Unbecoming, Discourteous, Disrespectful, Lay, Vocational, Occupational, Career, Nonprofessional, Untrained, Professional, Amateur, Unskilled, Inexpert, Amateurish

Amateur Extra Class in order to administer an Amateur Extra Class operator license examination.
Before you can become an amateur boxer, you must apply for an amateur boxing license.
ARRL Michigan Section Training Manager and conduct amateur radio leadership workshops for amateur radio club leaders in Michigan.
Field Day is an annual amateur radio exercise, widely sponsored by IARU regions and member organizations, encouraging emergency communications preparedness among amateur radio operators.
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Licensed amateur radio operators are expressly allowed to use amateur radio frequencies for telecommand of model aircraft.
Amateur Radio Stack Exchange is a question and answer site for amateur radio enthusiasts.
Those with Amateur Extra licenses are granted all privileges on all US amateur bands.
The classes of amateur operator license grants are: Novice, Technician, General, Advanced, and Amateur Extra.
Amateur Transmitter and you will need an Amateur Licence to use it.

Haul as unprofessional, inconsistence, inconsiderate, disrespectful and belittling.
Good apartment amenities with a horrible unprofessional management.
Unprofessional behaviour was rampant and sales were poor.
Obviously, this kind of behavior is extremely unprofessional.
Very unprofessional communication and no customer service skills.
This carwash is small minded, rude and unprofessional.
The management is extremely rude, disrespectful, and unprofessional.
They have been nothing but unprofessional with me.
She states for unacceptable conduct and performance, sample letter of reprimand for unprofessional conduct pertaining to unprofessional will.
They categorize certain behaviours on social media into two categories: unprofessional and possibly unprofessional.