Select the option that can be used as a one-word substitute for the given group of words.

One who does something not professionally but for pleasure

Amateur

The option that can be used as a one-word substitute for "one who does something not professionally but for pleasure" is amateur.

• Professional means engaged in a particular activity as one's main paid occupation rather than as a pastime.
• Mature means having or showing the qualities of a fully developed adult, especially in terms of emotional and intellectual growth.
• Immature means not fully developed or grown; not yet adult.
• Amateur means engaged in an activity for pleasure rather than as a profession.