dome vs domed stadium

dome and domed stadium both are nouns.

Word	Noun	Adjective	Verb	Adverb
dome	Yes	No	No	No
domed stadium	Yes	No	No	No

As nouns, dome and domed stadium are synonyms defined as:

Other synonyms of dome include covered stadium.

dome (noun)	domed stadium (noun)
a hemispherical roof	a stadium that has a roof
a stadium that has a roof
informal terms for a human head
a concave shape whose distinguishing characteristic is that the concavity faces downward