bearing false witness vs perjury

bearing false witness and perjury both are nouns.

Word	Noun	Adjective	Verb	Adverb
bearing false witness	Yes	No	No	No
perjury	Yes	No	No	No

As nouns, bearing false witness and perjury are synonyms defined as:

bearing false witness and perjury: criminal offense of making false statements under oath

Other synonyms of bearing false witness include lying under oath.

bearing false witness (noun)	perjury (noun)
criminal offense of making false statements under oath	criminal offense of making false statements under oath