nontruth
/ˈnɒnˌtruːθ/Definitions
1. noun
a false statement or something that is not true
“The politician’s nontruth about the economy was exposed by the media.”
2. noun
the state of being untrue or false
“The nontruth of her allegations led to a lengthy investigation.”
3. noun
a lack of truth or genuineness
“The nontruth in her story made it difficult to trust her account.”