deck-house vs superstructure

deck-house and superstructure both are nouns.

Word	Noun	Adjective	Verb	Adverb
deck-house	Yes	No	No	No
superstructure	Yes	No	No	No

As nouns, superstructure is a hypernym of deck-house; that is, superstructure is a word with a broader meaning than deck-house:

deck-house: a superstructure on the upper deck of a ship
superstructure: structure consisting of the part of a ship above the main deck

deck-house (noun)	superstructure (noun)
a superstructure on the upper deck of a ship	structure consisting of the part of a ship above the main deck