nimbus cloud vs aureole

nimbus cloud and aureole both are nouns.

Word	Noun	Adjective	Verb	Adverb
nimbus cloud	Yes	No	No	No
aureole	Yes	No	No	No

nimbus cloud (noun)	aureole (noun)
a dark grey cloud bearing rain	an indication of radiant light drawn around the head of a saint
	the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse