hoax[noun]Synonyms:- trick, con 
(informal), deception, fraud, practical joke, prank, spoof 
(informal), swindle
[verb]Synonyms:- deceive, con 
(slang), dupe, fool, hoodwink, swindle, take in 
(informal), trick 
 [TahlilGaran] English Synonym Dictionary ▲
 hoax /həʊks $ hoʊks/ 
 noun [countable][
Date: 1700-1800; 
Origin: Probably from hocus;  ⇒ hocus-pocus]
1.  a false warning about something dangerous: 
 a bomb hoax
 a bomb hoax hoax calls  (=telephone calls giving false information) to the police2.
 hoax calls  (=telephone calls giving false information) to the police2.  an attempt to make people believe something that is not true: 
 an elaborate hoax
 an elaborate hoax  [TahlilGaran] Dictionary of Contemporary English ▲