anchor ring vs halo

anchor ring and halo both are nouns.

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

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

Other synonyms of anchor ring include annulus, doughnut, ring.

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