Hybrids are plagued with manufacturers' marketing departments making up names for their system rather than using industry standard terms.
Most people seem to understand the difference between hybrid and plug-in hybrid, the difference being whether you can plug it in to a charger or not - but Toyota clouded the issue by calling their hybrids "self-charging hybrid" and Nissan seem to dislike admitting their "range extender electric".
There's also a whole raft of different 4x4 systems in use, especially when you get into locking differentials and electronic thrust vectoring - I know exactly what my VW Touareg has got but I defy anyone to put it into a single, simple category.