fungus kingdom vs annulus

fungus kingdom and annulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
fungus kingdom	Yes	No	No	No
annulus	Yes	No	No	No

fungus kingdom (noun)	annulus (noun)
the taxonomic kingdom including yeast, molds, smuts, mushrooms, and toadstools; distinct from the green plants	(Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
	a toroidal shape