doughnut vs halo

doughnut and halo both are nouns.

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

As nouns, doughnut and halo are synonyms defined as:

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

doughnut (noun)	halo (noun)
a small ring-shaped friedcake	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