nuclear weapon vs atomic weapon

nuclear weapon and atomic weapon both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuclear weapon	Yes	No	No	No
atomic weapon	Yes	No	No	No

As nouns, nuclear weapon and atomic weapon are synonyms defined as:

nuclear weapon and atomic weapon: a weapon of mass destruction whose explosive power derives from a nuclear reaction

nuclear weapon (noun)	atomic weapon (noun)
a weapon of mass destruction whose explosive power derives from a nuclear reaction	a weapon of mass destruction whose explosive power derives from a nuclear reaction