Open English Wordnet
Nouns
(n)kingdom, land, realma 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” (n)region, realma 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”