appurtenance

noun

1. equipment consisting of miscellaneous articles needed for a particular operation or sport etc.

   noun.artifact

   Synonyms gear paraphernalia

   Source: WordNet 3.0

2. a supplementary component that improves capability

   noun.artifact

   Synonyms accessory add-on supplement

   Source: WordNet 3.0

3. That which belongs to something else; an adjunct; an appendage; an accessory; something annexed to another thing more worthy; in common parlance and legal acceptation, something belonging to another thing as principal, and which passes as incident to it, as a right of way, or other easement to land; a right of common to pasture, an outhouse, barn, garden, or orchard, to a house or messuage. In a strict legal sense, land can never pass as an appurtenance to land.

   noun

   Source: webster1913