Noun
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.
Treachery; deceit; perfidy; unfaithfulness.
A counterfeit; a false appearance; an imposture.
Source: Webster's dictionaryNever lie, but always tell the truth. For falsehood and deceit is the most harmful of all vices, and the customary work of the devil. Theophan the Recluse
Falsehood is so easy, truth so difficult. George Eliot
Falsehood is invariably the child of fear in one form or another. Aleister Crowley
One falsehood spoils a thousand truths. Ghana Proverb
Half-truth is more dangerous than falsehood. Bengali Proverb
There lies often falsehood beneath a pretty skin. Faroese Proverb