malarkey vs idle words

malarkey and idle words both are nouns.

Word	Noun	Adjective	Verb	Adverb
malarkey	Yes	No	No	No
idle words	Yes	No	No	No

As nouns, malarkey and idle words are synonyms defined as:

malarkey and idle words: empty rhetoric or insincere or exaggerated talk

Other synonyms of malarkey include jazz, malarky, nothingness, wind.

malarkey (noun)	idle words (noun)
empty rhetoric or insincere or exaggerated talk	empty rhetoric or insincere or exaggerated talk