nefarious |
perfidiousness |
As an adjective nefarious
is sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.
As a noun perfidiousness is
(rare) unfaithfulness; deceitfulness; perfidy.
taxonomy |
perfidiousness |
As nouns the difference between taxonomy and perfidiousness
is that
taxonomy is the science or the technique used to make a classification while
perfidiousness is (rare) unfaithfulness; deceitfulness; perfidy.