falsehood vs knavery

falsehood and knavery both are nouns.

Word	Noun	Adjective	Verb	Adverb
falsehood	Yes	No	No	No
knavery	Yes	No	No	No

As nouns, knavery is a hypernym of falsehood; that is, knavery is a word with a broader meaning than falsehood:

falsehood: the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting
knavery: lack of honesty; acts of lying or cheating or stealing

Other hypernyms of falsehood include dishonesty.

falsehood (noun)	knavery (noun)
the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting	lack of honesty; acts of lying or cheating or stealing
a false statement