On a general note, terminology is confused because many of the images show 'ghosts' more than they do flare. 'Ghosts' of course being reflections of the actual aperture opening and thus clearly showing its polygon-shaped outline. 'Flare' in contrast is just that - something that appears as more or less clearly defined veiling of the entire or parts of the image. Flare reduces the overall contrast.
The two concepts are extremes at either and of a long axis of reflective artefacts going on inside the lens. So admittedly there are transitions. But at the very least, one should for clarity apply the most suitable designation.
Oh well.
