anchor ring vs doughnut

anchor ring and doughnut both are nouns.

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

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

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

anchor ring (noun)	doughnut (noun)
a toroidal shape	a small ring-shaped friedcake
	a toroidal shape