halo vs atmospheric phenomenon

halo and atmospheric phenomenon both are nouns.

Word	Noun	Adjective	Verb	Adverb
halo	Yes	No	No	No
atmospheric phenomenon	Yes	No	No	No

As nouns, atmospheric phenomenon is a hypernym of halo; that is, atmospheric phenomenon is a word with a broader meaning than halo:

halo: a circle of light around the sun or moon
atmospheric phenomenon: a physical phenomenon associated with the atmosphere

halo (noun)	atmospheric phenomenon (noun)
an indication of radiant light drawn around the head of a saint	a physical phenomenon associated with the atmosphere
a circle of light around the sun or moon
a toroidal shape