Nouns

(n)populace, public, worldpeople in general considered as a whole“he is a hero in the eyes of the public”
(n)publica body of people sharing some common interest“the reading public”

Adjectives

(a)publicnot private; open to or concerning the people as a whole“the public good”, “public libraries”, “public funds”, “public parks”, “a public scandal”, “public gardens”, “performers and members of royal families are public figures”
(s)publicaffecting the people or community as a whole“the public welfare”, “Public interests”, “Public leaders”