circumstantiable

from The Collaborative International Dictionary of English v.0.48

circumstantiable \cir`cum*stan"tia*ble\
   (s[~e]r`k[u^]m*st[a^]n"sh[.a]*b'l) a.
   Capable of being circumstantiated. [Obs.] --Jer Taylor.
   [1913 Webster]