aura vs halo

aura and halo both are nouns.

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

As nouns, aura and halo are synonyms defined as:

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

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

aura (noun)	halo (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 distinctive but intangible quality surrounding a person or thing	a circle of light around the sun or moon
a sensation (as of a cold breeze or bright light) that precedes the onset of certain disorders such as a migraine attack or epileptic seizure	a toroidal shape