insidiousness vs perfidiousness

insidiousness and perfidiousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insidiousness	Yes	No	No	No
perfidiousness	Yes	No	No	No

As nouns, perfidiousness is a hypernym of insidiousness; that is, perfidiousness is a word with a broader meaning than insidiousness:

Other hypernyms of insidiousness include perfidy, treachery.

insidiousness (noun)	perfidiousness (noun)
subtle and cumulative harmfulness (especially of a disease)	betrayal of a trust
the quality of being designed to entrap