Synonyms: accessory, add-on, appurtenance, supplement
Definition: a supplementary component that improves capability
Similar words: component, element, constituent
Definition: an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
Usage: spare components for cars; a component or constituent element of a system
Synonyms: paraphernalia, appurtenance, gear
Definition: equipment consisting of miscellaneous articles needed for a particular operation or sport etc.
Similar words: equipment
Definition: an instrumentality needed for an undertaking or to perform a service