Want of truth or accuracy; an untrue assertion or representation; error; misrepresentation; falsity.

A deliberate intentional assertion of what is known to be untrue; a departure from moral integrity; a lie.

an error in the claims one makes

A counterfeit; a false appearance; an imposture.

the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting

Treachery; deceit; perfidy; unfaithfulness.

a false declaration designedly made

a false statement