Un-named Relations

Know not the name game,
All relations can't have name.

Why need a tag for no reason!
Trust is the key word for all season.

Dictionery provides many options
But there are few un-named relations.

Mother, Father, sister and brother,
Son,Daughter,In-laws are there
Grand parents, Uncle,aunty and others,
But why all others are tagged as friends?
More than friendship,can't one get?

Why need a tag for no reason!
Trust is the key word for all seasons.
And there are few un-named relations.