halo vs aureole

halo and aureole both are nouns.

Word	Noun	Adjective	Verb	Adverb
halo	Yes	No	No	No
aureole	Yes	No	No	No

As nouns, halo and aureole are synonyms defined as:

halo and aureole: an indication of radiant light drawn around the head of a saint

Other synonyms of halo include aura, gloriole, glory, nimbus.

halo (noun)	aureole (noun)
an indication of radiant light drawn around the head of a saint	an indication of radiant light drawn around the head of a saint
a circle of light around the sun or moon	the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
a toroidal shape