"deadness" in the noun sense
1. unresponsiveness, deadness
the quality of being unresponsive not reacting as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events
"she began to recover from her numb unresponsiveness after the accident"
"in an instant all the deadness and withdrawal were wiped away"
the physical property of something that has lost its elasticity
"he objected to the deadness of the tennis balls"
the inanimate property of something that has died
Source: WordNet® (An amazing lexical database of English)
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