solidarity

noun

1. 1

   A bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group.

   “A long time union member himself, Phil showed solidarity with the picketing grocery store workers by shopping at a competing, unionized store.”

2. 2

   Willingness to give psychological and/or material support when another person is in a difficult position or needs affection.

   “Only the solidarity provided by her siblings allowed Margaret to cope with her mother's harrowing death.”