passage vs lockage

passage and lockage both are nouns.

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

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

passage (noun)	lockage (noun)
a journey usually by ship	passage through a lock in a canal or waterway
the passing of a law by a legislative body	a system of locks in a canal or waterway
the act of passing something to another person	a fee charged for passage through a lock in a canal or waterway
the act of passing from one state or place to the next
a bodily reaction of changing from one place or stage to another
a way through or along which someone or something may pass
a path or channel or duct through or along which something may pass
a section of text; particularly a section of medium length
a short section of a musical composition
the motion of one object relative to another