deadliness

We are not talking about an end to spree killing, only about a (perhaps) very slight reduction in its deadliness.

The assault was met with a stream of fire, given with steady deadliness, which sent the rebels back to their covert.

It was uncanny in its silent deadliness, and there seemed a surety about it that was appalling.

She saw a man now—wild, white, intense as fire, with some terrible cool kind of deadliness in his mien.

Terrified into folly by the suddenness and deadliness of this peril, the squirrel ran too far up the tree and was almost cornered.

There must be some way in which he could overcome, or even utilize, his inherent deadliness to these people.