domain vs kingdom

domain and kingdom both are nouns.

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

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

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

domain (noun)	kingdom (noun)
the content of a particular field of knowledge	a basic group of natural objects
people in general; especially a distinctive group of people with some shared interest	a monarchy with a king or queen as head of state
(mathematics) the set of values of the independent variable for which a function is defined	the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
territory over which rule or control is exercised	the domain ruled by a king or queen
a particular environment or walk of life	a country with a king as head of state
	a domain in which something is dominant