class struggle vs class warfare

class struggle and class warfare both are nouns.

Word	Noun	Adjective	Verb	Adverb
class struggle	Yes	No	No	No
class warfare	Yes	No	No	No

As nouns, class struggle and class warfare are synonyms defined as:

class struggle and class warfare: conflict between social or economic classes (especially between the capitalist and proletariat classes)

Other synonyms of class struggle include class war.

class struggle (noun)	class warfare (noun)
conflict between social or economic classes (especially between the capitalist and proletariat classes)	conflict between social or economic classes (especially between the capitalist and proletariat classes)