Aggeus vs Old Testament

Aggeus and Old Testament both are nouns.

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

Aggeus (noun)	Old Testament (noun)
an Old Testament book telling the prophecies of Haggai which are concerned mainly with rebuilding the temples after the Babylonian Captivity	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, the first of three post-exile prophets from the Neo-Babylonian Exile of the House of Judah