Noun
actualism (countable and uncountable, plural actualisms)
(philosophy) The belief that actuality and existence are co‐extensive: i.e., that only actual things exist, and merely possible things do not.
Antonym: possibilism
It has also been argued that Pynchon's prose style is influenced by Nabokov's preference for actualism over realism. Source: Internet
Pickard-Cambridge) Applied Nominalism redirects the thesis of nominalism to the highest level of self actualism whereby all individuals are equal and collectively creates community actualism where everyone is without hierarchy. Source: Internet