Both Uses of

feud
in
Main Street, by Sinclair Lewis

Its philosophy and its feuds dominated her.†
Chpt 20 *

feuds = bitter, long-standing fights

I've been thinking about getting up an annual Community Day, when the whole town would forget feuds and go out and have sports and a picnic and a dance.†
Chpt 39

Definition:

bitter hostile argument between two parties -- typically long-standing between families or tribes with occasional incidents of violence

Sometimes the term blood feud is used to reference a feud between families.