extra

An additional benefit or feature that is provided.

An additional feature that can be chosen but is not standard.

An additional cost that is not immediately apparent.

A small additional item or amount, often for luxury or pleasure.

Additional content on a DVD, like deleted scenes or interviews.

Used when the additional items are the subject of the verb 'include'.

To possess or be equipped with additional features or items.

To contain additional features or items as part of a whole.