chain reactor vs atomic reactor

chain reactor and atomic reactor both are nouns.

Word	Noun	Adjective	Verb	Adverb
chain reactor	Yes	No	No	No
atomic reactor	Yes	No	No	No

As nouns, chain reactor and atomic reactor are synonyms defined as:

chain reactor and atomic reactor: a nuclear reactor that uses controlled nuclear fission to generate energy

Other synonyms of chain reactor include atomic pile, pile.

chain reactor (noun)	atomic reactor (noun)
a nuclear reactor that uses controlled nuclear fission to generate energy	a nuclear reactor that uses controlled nuclear fission to generate energy