Genesis vs Old Testament

Genesis and Old Testament both are nouns.

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

Genesis (noun)	Old Testament (noun)
the first book of the Old Testament: tells of Creation; Adam and Eve; the Fall of Man; Cain and Abel; Noah and the flood; God's covenant with Abraham; Abraham and Isaac; Jacob and Esau; Joseph and his brothers	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