unavailability
— Noun
– English
~ the quality of not being available when needed
unavoidability
— Noun
– English
~ the quality of being impossible to avoid or evade
unavoidable casualty
— Noun
– English
~ a natural and unavoidable catastrophe that interrupts the expected course of events; "he discovered that his house was not insured against acts of God"
unawareness
— Noun
– English
~ unconsciousness resulting from lack of knowledge or attention
unbalance
— Noun
– English
~ a lack of balance or state of disequilibrium; "a hormonal imbalance"
unbalance
— Noun
– English
~ a state of mental disturbance and disorientation