What is another word for feign that one is mad?
Pronunciation: [fˈe͡ɪn ðˈatwˌɒn ɪz mˈad] (IPA) 
There are several synonyms for the phrase "feign that one is mad." Some of the most common substitutes include pretending to be crazy, acting insane, faking mental illness, simulating lunacy, and fabricating madness. Other phrases that can be used in place of this phrase include pretending to be deranged, putting on a mad act, acting demented, and pretending to have lost one's mind. Although these phrases may have slightly different connotations, they are all essentially synonyms for the same thing: pretending to have a mental illness in order to deceive or confuse others.
