kingdom Protoctista vs kingdom

kingdom Protoctista and kingdom both are nouns.

Word	Noun	Adjective	Verb	Adverb
kingdom Protoctista	Yes	No	No	No
kingdom	Yes	No	No	No

As nouns, kingdom is a hypernym of kingdom Protoctista; that is, kingdom is a word with a broader meaning than kingdom Protoctista:

kingdom Protoctista: in most modern classifications, replacement for the Protista; includes: Protozoa, Euglenophyta, Chlorophyta, Cryptophyta, Heterokontophyta, Rhodophyta, unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals
kingdom: the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia

kingdom Protoctista (noun)	kingdom (noun)
in most modern classifications, replacement for the Protista; includes: Protozoa, Euglenophyta, Chlorophyta, Cryptophyta, Heterokontophyta, Rhodophyta, unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals	a basic group of natural objects
	a monarchy with a king or queen as head of state
	the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
	the domain ruled by a king or queen
	a country with a king as head of state
	a domain in which something is dominant