Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun realm

3 senses of realm

Sense 1
kingdom, land, realm -- (a domain in which something is dominant; "the untroubled kingdom of reason"; "a land of make-believe"; "the rise of the realm of cotton in the south")
       => sphere, domain, area, orbit, field, arena -- (a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit")

Sense 2
kingdom, realm -- (the domain ruled by a king or queen)
       => domain, demesne, land -- (territory over which rule or control is exercised; "his domain extended into Europe"; "he made it the law of the land")

Sense 3
region, realm -- (a knowledge domain that you are interested in or are communicating about; "it was a limited realm of discourse"; "here we enter the region of opinion"; "the realm of the occult")
       => knowledge domain, knowledge base, domain -- (the content of a particular field of knowledge)