verisimilitude \ver-uh-suh-MIL-uh-tood; -tyood\ (noun) - 1 : The appearance of truth; the quality of seeming to be true. 2 : Something that has the appearance of being true or real.
"For those plays, Ms. Smith interviewed hundreds of people of different races and ages, somehow managing to internalize their expressions, anger and quirks enough to be able to portray them with astonishing verisimilitude." -- Sarah Boxer, "An Experiment in Artistic Democracy"
Verisimilitude comes from Latin verisimilitudo, from verisimilis, from verus, "true" + similis, "like, resembling, similar." The adjective form is verisimilar.