dockage vs arrival

dockage and arrival both are nouns.

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

As nouns, arrival is a hypernym of dockage; that is, arrival is a word with a broader meaning than dockage:

dockage (noun)	arrival (noun)
the act of securing an arriving vessel with ropes	accomplishment of an objective
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	the act of arriving at a certain place
a fee charged for a vessel to use a dock	someone who arrives (or has arrived)