radio noise vs atmospherics

radio noise and atmospherics both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio noise	Yes	No	No	No
atmospherics	Yes	No	No	No

As nouns, atmospherics is a hypernym of radio noise; that is, atmospherics is a word with a broader meaning than radio noise:

radio noise: static at radio wavelengths
atmospherics: a crackling or hissing noise caused by electrical interference

Other hypernyms of radio noise include atmospheric static, static.

radio noise (noun)	atmospherics (noun)
static at radio wavelengths	a crackling or hissing noise caused by electrical interference