Old Testament vs Lot's wife

Old Testament and Lot's wife both are nouns.

Word	Noun	Adjective	Verb	Adverb
Old Testament	Yes	No	No	No
Lot's wife	Yes	No	No	No

Old Testament (noun)	Lot's wife (noun)
the collection of books comprising the sacred scripture of the Hebrews and recording their history as the chosen people; the first half of the Christian Bible	(Old Testament) when God destroyed Sodom and Gomorrah, Lot and his family were told to flee without looking back; Lot's wife was disobedient and was immediately changed into a pillar of salt