age vs get on

age is a noun but get on is not a noun.

Word	Noun	Adjective	Verb	Adverb
age	Yes	No	Yes	No
get on	No	No	Yes	No

As verbs, age and get on are synonyms defined as:

Other synonyms of age include maturate, mature, senesce.

age (noun)	get on (noun)
how long something has existed
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

age (verb)	get on (verb)
grow old or older	develop in a positive way
begin to seem older; get older	appear in a show, on T.V. or radio
make older	grow old or older
	get up on the back of
	grow late or (of time) elapse
	get on board of (trains, buses, ships, aircraft, etc.)
	have smooth relations