Friction and In-fighting

Friction noun - A lack of agreement or harmony.

In-fighting and friction are semantically related In some cases you can replace phrase "In-fighting" with "Friction", this terms are similar.

In-fighting noun - Conflict between members of the same organization (usually concealed from outsiders).

Friction and in-fighting are semantically related in conflict topic. You can use "Friction" instead a noun phrase "In-fighting".