dockage vs fee

dockage and fee both are nouns.

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

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

dockage (noun)	fee (noun)
the act of securing an arriving vessel with ropes	a fixed charge for a privilege or for professional services
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	an interest in land capable of being inherited
a fee charged for a vessel to use a dock

dockage (verb)	fee (verb)
	give a tip or gratuity to in return for a service, beyond the compensation agreed on