| noun | clothing that is worn or carried, but not part of your main clothing |
| noun | a supplementary component that improves capability |
| noun | someone who helps another person commit a crime |
| adjective | aiding and abetting in a crime “he was charged with being accessory to the crime” |
| adjective | furnishing added support “an ancillary pump” |
| accessorial | adjective | nonessential but helpful |
| accessory | adjective | furnishing added support |
| appurtenant | adjective | furnishing added support |
| appertain | verb | be a part or attribute of |
| supplementary | adjective | functioning in a supporting capacity |
| supplemental | adjective | functioning in a supporting capacity |
| supplement | verb | add as a supplement to what seems insufficient |
| add on | verb | add to the very end |
| accessory | noun | a supplementary component that improves capability |
| adjunct | noun | something added to another thing but not an essential part of it |
| appurtenance | noun | a supplementary component that improves capability |
| auxiliary | noun | someone who acts as assistant |