Loose Canon: Not clearly canon, but neatly fits into it.
Schrödinger's Canon: Work is meant to be canonical to some extent, but other parts are not cohesive with the main canon, therefore it's both canon and non-canon.
Adaptation Deviation is when an adaptation makes major changes from the source material in such a way it's quite a change.
In Name Only is when the work could stand alone on its own merit and all that ties it to the source material is the title. Often involves drastic changes.
Thinking of adding some new tropes to Canonical List of Subtle Trope Distinctions:
Planned additions:
Broad Strokes vs Loose Canon vs The Stations of the Canon
Loose Canon vs Schrödinger's Canon
Alan Smithee vs Stage Name
Adaptation Deviation vs In Name Only
Secret-Identity Identity vs Second Super-Identity
Checking here to avoid any Edit War ; this isn't a TRS situation but not sure it fits Ask The Tropers.