age vs Age of Reason

age and Age of Reason both are nouns.

Word	Noun	Adjective	Verb	Adverb
age	Yes	No	Yes	No
Age of Reason	Yes	No	No	No

age (noun)	Age of Reason (noun)
how long something has existed	a movement in Europe from about 1650 until 1800 that advocated the use of reason and individualism instead of tradition and established doctrine
a time of life (usually defined in years) at which some particular qualification or power arises
a late time of life
an era of history having some distinctive feature
a prolonged period of time