WordNet sense 1 (the state of being actual or real):

reality, realness

WordNet sense 2 (an artistic movement in 19th century France; artists and writers strove for detailed realistic and factual description):

naturalism

WordNet sense 3 ((philosophy) the philosophical doctrine that physical objects continue to exist when not perceived):

naive realism

WordNet sense 4 ((philosophy) the philosophical doctrine that abstract concepts exist independent of their names):

Platonism

WordNet sense 5 (the attribute of accepting the facts of life and favoring practicality and literal truth):

pragmatism