As verbs the difference between mad and mads
is that
mad is to madden, to anger, to frustrate while
mads is third-person singular of mad.
As an adjective mad
is insane; crazy, mentally deranged.
As an adverb mad
is intensifier; to a large degree; extremely; exceedingly; very; unbelievably.
As an acronym MAD
is mutually assured destruction.