Lewis Short
rĕbellĭum (noun N) : id.
* A renewal of war, revolt, rebellion (a collat. form for rebellio, like consortium for consortio, contagium for contagio, etc.): qui pacatos ad rebellium incitasset,Liv. 42, 21, 3 Gronov. (dub.; Weissenb. rebellandum).
Charlton T. Lewis, Charles Short, A Latin Dictionary