verisimilitude
Concise Oxford English Dictionary © 2008 Oxford University Press:
verisimilitude /ˌvɛrɪsɪˈmɪlɪtjuːd/
▶noun the appearance of being true or real.
– derivatives
verisimilar adjective.
verisimilar adjective.
– origin C17: from L. verisimilitudo, from verisimilis ‘probable’, from veri (genitive of verus ‘true’) + similis ‘like’.
'verisimilitude' also found in these Oxford entries:

