Unavoidability is a synonym of inevitability.
As nouns the difference between inevitability and unavoidability
is that inevitability is the condition of being inevitable while unavoidability is the state or condition of being unavoidable.
inevitability
English
Noun
(uncountable) The condition of being inevitable.
(countable) An inevitable condition or outcome.
Synonyms
* certainty
* necessity
Antonyms
* evitability
* impossibility
* contingency
unavoidability
English
Noun
(-)
The state or condition of being unavoidable.
Synonyms
* inevitability
Antonyms
* avoidability