1) Connectedness 2) Connection 3) Connexion 
Grade II listed buildings in the English county of Hampshire. ...
in genetics, the degree to which one person is related to another; or, the degree to which one species is related to another
• (n.) The state or condition of being related; relationship; affinity.
Re·lat'ed·ness noun The state or condition of being related; relationship; affinity. [ R.] Emerson. 
Two clades are more closely related when they share a more recent common ancestor between them than they do with any other clade.
[n] - a particular manner of connectedness
noun a particular manner of connectedness; `the relatedness of all living things`