appurtenance vs attachment

appurtenance

noun
  • Equipment used for some specific task; gear. 

  • That which appertains; an appendage to something else; an addition. 

  • A subordinate interest in land which benefits a principal estate, which cannot be detached from or held separately to that estate; an appurtenant interest. 

  • A modifier that is appended or prepended to another word to coin a new word that expresses belonging. 

  • The state or quality of being an appurtenance. 

attachment

noun
  • A device attached to a piece of equipment or a tool. 

  • The means by which something is physically attached. 

  • Taking a person's property to satisfy a court-ordered debt. 

  • The act or process of (physically or figuratively) attaching. 

  • A strong bonding with or fondness for someone or something. 

  • A file sent along with a message, usually an email. 

  • The act or process by which any (downward) leader connects to any available (upward) streamer in a lightning flash. 

  • A dependence, especially a strong one. 

How often have the words appurtenance and attachment occurred in a corpus of books? (source: Google Ngram Viewer )