accessory
Definitions
A thing which can be added to something else in order to make it more useful, versatile, or attractive.
A person who helps another commit a crime, though they may not be present at the time of the offense.
Examples
She chose a silk scarf as the perfect accessory to complete her outfit.
The store sells a wide range of mobile phone accessories, including cases and chargers.
Synonyms
adjunct attachment supplement addition appurtenance extra add-on
Antonyms
essential necessity requirement fundamental base core staple