Zephaniah vs Old Testament

Zephaniah and Old Testament both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zephaniah	Yes	No	No	No
Old Testament	Yes	No	No	No

Zephaniah (noun)	Old Testament (noun)
an Old Testament book telling the prophecies of Zephaniah which are concerned mainly with the approaching judgment by God upon the sinners of Judah	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
a Hebrew minor prophet of the late 7th century BC