Well, heck, why not? The more typical modern usage of the word henge means an earthwork consisting of a ring-shaped bank with a ditch in the middle. It was taken from Stonehenge, and note that Stonehenge does not fit that definition of henge (because its ditch is outside the bank). The henge in Stonehenge actually means suspended, as in "suspended stones". So go ahead and pile on another definition also quasi-related to Stonehenge, I say.