buzzword vs hokum

buzzword and hokum both are nouns.

Word	Noun	Adjective	Verb	Adverb
buzzword	Yes	No	No	No
hokum	Yes	No	No	No

As nouns, hokum is a hypernym of buzzword; that is, hokum is a word with a broader meaning than buzzword:

buzzword: stock phrases that have become nonsense through endless repetition
hokum: a message that seems to convey no meaning

Other hypernyms of buzzword include bunk, meaninglessness, nonsense, nonsensicality.

buzzword (noun)	hokum (noun)
stock phrases that have become nonsense through endless repetition	a message that seems to convey no meaning