king vs kingdom

king and kingdom both are nouns.

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

king (noun)	kingdom (noun)
(chess) the weakest but the most important piece	a basic group of natural objects
one of the four playing cards in a deck bearing the picture of a king	a monarchy with a king or queen as head of state
a checker that has been moved to the opponent's first row where it is promoted to a piece that is free to move either forward or backward	the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
a male sovereign; ruler of a kingdom	the domain ruled by a king or queen
a very wealthy or powerful businessman	a country with a king as head of state
a male competitor who holds a preeminent position	a domain in which something is dominant
the husband or widower of a queen
preeminence in a particular category or group or field