falsehood vs forgery

falsehood and forgery both are nouns.

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

As nouns, forgery is a hyponym of falsehood; that is, forgery is a word with a more specific, narrower meaning than falsehood:

falsehood: the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting
forgery: criminal falsification by making or altering an instrument with intent to defraud

Other hyponyms of falsehood include frame-up, setup, sophistication.

falsehood (noun)	forgery (noun)
the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting	criminal falsification by making or altering an instrument with intent to defraud
a false statement	a copy that is represented as the original