coup vs putsch

coup and putsch both are nouns.

Word	Noun	Adjective	Verb	Adverb
coup	Yes	No	No	No
putsch	Yes	No	No	No

As nouns, coup and putsch are synonyms defined as:

coup and putsch: a sudden and decisive change of government illegally or by force

Other synonyms of coup include coup d'etat, takeover.

coup (noun)	putsch (noun)
a sudden and decisive change of government illegally or by force	a sudden and decisive change of government illegally or by force
a brilliant and notable success