Septuagint vs Old Testament

Septuagint and Old Testament both are nouns.

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

Septuagint (noun)	Old Testament (noun)
the oldest Greek version of the Old Testament; said to have been translated from the Hebrew by Jewish scholars at the request of Ptolemy II	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