"less threatened" is a correct and usable phrase in written English.
For example, "The endangered species was feeling less threatened as the conservation efforts began to take effect."
General Bentégeat said that while France "is certainly not the most threatened," all European countries were more or less threatened by Al Qaeda.
Israel too would feel less threatened.
Longtime residents seem less threatened than wistful.
Mr. Medvedev, however, seems less threatened by him.
"Many seekers of religion feel less threatened in a mall".
Japan feels less threatened, however, by Iran's apparent intention to build nuclear weapons.
Put bluntly, Europe needs America less now that it feels less threatened.
The belief at the time was that Phillips felt less threatened by Duquette than by Minaya.
This play can teach us to be more respectful, less threatened by what we don't understand.
As Jews became more culturally assimilated, they felt less threatened by an increasingly tolerant Christian majority.
Counties in New Jersey's sandy shore areas are much less threatened.
