realm vs kingdom

realm and kingdom both are nouns.

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

As nouns, realm and kingdom are synonyms defined as:

As nouns, realm and kingdom are synonyms defined as:

Other synonyms of realm include land.

realm (noun)	kingdom (noun)
a knowledge domain that you are interested in or are communicating about	a basic group of natural objects
the domain ruled by a king or queen	a monarchy with a king or queen as head of state
a domain in which something is dominant	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