society vs open society

society and open society both are nouns.

Word	Noun	Adjective	Verb	Adverb
society	Yes	No	No	No
open society	Yes	No	No	No

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

society: an extended social group having a distinctive cultural and economic organization
open society: a society that allows its members considerable freedom (as in a democracy)

Other hyponyms of society include civilisation, civilization, civilisation, civilization, culture, tribal society.

society (noun)	open society (noun)
an extended social group having a distinctive cultural and economic organization	a society that allows its members considerable freedom (as in a democracy)
a formal association of people with similar interests
the fashionable elite
the state of being with someone