1) (especially) the mental state of feeling or being different from other people, without friends (alienation)

2) to cause a person no longer to have friends (estrange)

3) (an instance, period, of) the feeling or relationship that exists between friends (friendship)

4) friends and relations (kith)

5) a name other than a real name used by friends and family (pet name)

6) an informal meeting of friends to sing songs together (singsong)