sports stadium vs stadium

sports stadium and stadium both are nouns.

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

As nouns, sports stadium and stadium are synonyms defined as:

sports stadium and stadium: a large structure for open-air sports or entertainments

Other synonyms of sports stadium include arena, bowl.

sports stadium (noun)	stadium (noun)
a large structure for open-air sports or entertainments	a large structure for open-air sports or entertainments