The Vocalibrate dictionary

verisimilitude

/ˌvɛrɪsɪˈmɪlɪˌtud/noun

the appearance of being true or real

The costumes and sets gave the film a verisimilitude that made audiences forget they were watching actors.

Near in meaning: realismplausibilitybelievabilityauthenticity
In the family: verisimilar

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