Close-in fighting and In-fighting

In-fighting and close-in fighting are semantically related. In some cases you can replace phrase "In-fighting" with "Close-in fighting", this phrases are similar.

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

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