toroid vs halo

toroid and halo both are nouns.

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

As nouns, halo is a hyponym of toroid; that is, halo is a word with a more specific, narrower meaning than toroid:

Other hyponyms of toroid include anchor ring, annulus, doughnut, ring.

toroid (noun)	halo (noun)
a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle	an indication of radiant light drawn around the head of a saint
the doughnut-shaped object enclosed by a torus	a circle of light around the sun or moon
	a toroidal shape