animal kingdom vs kingdom Animalia

animal kingdom and kingdom Animalia both are nouns.

Word	Noun	Adjective	Verb	Adverb
animal kingdom	Yes	No	No	No
kingdom Animalia	Yes	No	No	No

As nouns, animal kingdom and kingdom Animalia are synonyms defined as:

animal kingdom and kingdom Animalia: taxonomic kingdom comprising all living or extinct animals

Other synonyms of animal kingdom include Animalia.

animal kingdom (noun)	kingdom Animalia (noun)
taxonomic kingdom comprising all living or extinct animals	taxonomic kingdom comprising all living or extinct animals