kingdom vs domain

kingdom and domain both are nouns.

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

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

Other hypernyms of kingdom include demesne, land.

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

Other hypernyms of kingdom include area, arena, field, orbit, sphere.

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