S: (n) addition, add-on, improver (a component that is added to something to improve it) "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor"
S: (n) component, constituent, element (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) "spare components for cars"; "a component or constituent element of a system"
S: (n) part, portion (something less than the whole of a human artifact) "the rear part of the house"; "glue the two parts together"
S: (n) object, physical object (a tangible and visible entity; an entity that can cast a shadow) "it was full of rackets, balls and other objects"
W: (adj) accessory [Related to: accessory] (furnishing added support) "an ancillary pump"; "an adjuvant discipline to forms of mysticism"; "The mind and emotions are auxiliary to each other"
W: (adj) accessorial [Related to: accessory] (nonessential but helpful) "accessorial services included sorting and packing"
W: (adj) appurtenant [Related to: appurtenance] (furnishing added support) "an ancillary pump"; "an adjuvant discipline to forms of mysticism"; "The mind and emotions are auxiliary to each other"