Verisimilitude (noun)

1. The appearance of being true or real.
2. The quality of being likely or probable.

Origin:

From latin verisimilitūdō, from verus "true" + similis "lik.e"

Examples:

1. The film had a high degree of verisimilitude.
2. The play lacked verisimilitude as the characters were not believable.
3. The writer's descriptions gave the story a sense of verisimilitude.
4. The painting had a verisimilitude that made it almost like a photograph.
5. The politician's speech had a lack of verisimilitude, it seemed rehearsed and not genuine.