amateur

nouns

someone who pursues a study or sport as a pastime
is a type of (narrower)
a human being
"there was too much for one person to do"
an athlete who does not play for pay
antonym
is a type of (narrower)
a person trained to compete in sports

adjectives

engaged in as a pastime
"an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary"
lacking professional skill or expertise
"a very amateurish job"; "inexpert but conscientious efforts"; "an unskilled painting"