I haven't checked but I would guess that they call the Terrorists in Gaza, terrorists. And I don't think they call their own opponents in Ukraine terrorists, I think they are more honest than that. Guessing they don't call them anything, but probably describe what happens accurate.
They are not always right and I don't want to glorify Russia, bu their media reporting seem to be pretty based.
Have been following RT for the last 15 years and they have been mostly right so far.