halo vs anchor ring

halo and anchor ring both are nouns.

Word	Noun	Adjective	Verb	Adverb
halo	Yes	No	No	No
anchor ring	Yes	No	No	No

As nouns, halo and anchor ring are synonyms defined as:

Other synonyms of halo include annulus, doughnut, ring.

halo (noun)	anchor ring (noun)
an indication of radiant light drawn around the head of a saint	a toroidal shape
a circle of light around the sun or moon
a toroidal shape