hoax
hoax [ hōks ]
noun  (plural hoaxes)
Definition: 
deception: an act intended to trick people into believing something is real when it is not
transitive verb  (3rd person present singular hoaxes, present participle hoaxing, past and past participle hoaxed)
Definition: 
deceive people: to trick people into believing something is real when it is not
[Late 18th century. Probably alteration of hocus]
hoaxer noun

fraud
fraud [ frawd ] (plural frauds)
noun 
Definition: 
1. crime of cheating somebody: the crime of obtaining money or some other benefit by deliberate deception
2. somebody who deceives: somebody who deliberately deceives somebody else, usually for financial gain
3. something intended to deceive: something that is intended to deceive people
a story that was subsequently exposed as a fraud
[14th century. Via Old French< Latin fraud- 'cheating, fraud']