lockage vs fee

lockage and fee both are nouns.

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

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

lockage (noun)	fee (noun)
passage through a lock in a canal or waterway	a fixed charge for a privilege or for professional services
a system of locks in a canal or waterway	an interest in land capable of being inherited
a fee charged for passage through a lock in a canal or waterway

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