stadium vs structure

stadium and structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
stadium	Yes	No	No	No
structure	Yes	No	Yes	No

As nouns, structure is a hypernym of stadium; that is, structure is a word with a broader meaning than stadium:

Other hypernyms of stadium include construction.

stadium (noun)	structure (noun)
a large structure for open-air sports or entertainments	a thing constructed; a complex entity constructed of many parts
	the manner of construction of something and the arrangement of its parts
	a particular complex anatomical part of a living thing and its construction and arrangement
	the complex composition of knowledge as elements and their combinations
	the people in a society considered as a system organized by a characteristic pattern of relationships

stadium (verb)	structure (verb)
	give a structure to