What are the opposite words for necessity?

Antonyms for the word "necessity" include terms such as luxury, excess, and superfluity. A luxury is an item or experience that is not required for basic needs, but is desired for enjoyment or comfort. Excess refers to a surplus or abundance of something that is not needed, while superfluity refers to something that is excessive, unnecessary or redundant. Other antonyms for necessity include want, option, and choice. These terms suggest that there are alternative ways of obtaining the same outcome or fulfilling a need, without the same level of urgency or importance as a necessity.