lie vs falsity

lie and falsity both are nouns.

Word	Noun	Adjective	Verb	Adverb
lie	Yes	No	Yes	No
falsity	Yes	No	No	No

As nouns, falsity is a hypernym of lie; that is, falsity is a word with a broader meaning than lie:

Other hypernyms of lie include falsehood, untruth.

lie (noun)	falsity (noun)
a statement that deviates from or perverts the truth	a false statement
position or manner in which something is situated	the state of being false or untrue

lie (verb)	falsity (verb)
tell an untruth; pretend with intent to deceive
be lying, be prostrate; be in a horizontal position
assume a reclining position
be located or situated somewhere; occupy a certain position
originate (in)
have a place in relation to something else
be and remain in a particular state or condition