idle words vs malarkey

idle words and malarkey both are nouns.

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

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

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

Other synonyms of idle words include jazz, malarky, nothingness, wind.

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