Amateur and Unimportant person

Amateur noun - A person who regularly or occasionally engages in an activity as a pastime rather than as a profession.

Unimportant person and amateur are semantically related. In some cases you can use "Unimportant person" instead a noun "Amateur".

Amateur and unimportant person are semantically related. Sometimes you can use "Amateur" instead a noun phrase "Unimportant person".