idle words vs malarky

idle words and malarky both are nouns.

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

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

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

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