Use 'acquaintanceship' for people you know, but with whom you do not share deep personal connections. I have an acquaintanceship with a few neighbors; we just say hi.
Pro Tip 2/3
Professional Context
'Acquaintanceship' often refers to connections made in business or work environments. My acquaintanceship with the editor began at a networking event.
Pro Tip 3/3
Short-term Basis
Sometimes 'acquaintanceship' implies that the relationship has not lasted very long. Their acquaintanceship was brief, only lasting the duration of the course.