dockage vs marina

dockage and marina both are nouns.

Word	Noun	Adjective	Verb	Adverb
dockage	Yes	No	No	No
marina	Yes	No	No	No

As nouns, marina is a hyponym of dockage; that is, marina is a word with a more specific, narrower meaning than dockage:

dockage: landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out
marina: a fancy dock for small yachts and cabin cruisers

Other hyponyms of dockage include dry dock, drydock, graving dock.

dockage (noun)	marina (noun)
the act of securing an arriving vessel with ropes	a fancy dock for small yachts and cabin cruisers
landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out
a fee charged for a vessel to use a dock