Lewis & Short

ūnănĭmĭtas, ātis, f. [unanimus], unanimity, concord (very rare; cf.: concordia, consensus): egregia, Pac. ap. Non. 101, 26; 142, 32 (Trag. Rel. v. 109 Rib.): fraterna, Liv. 40, 8, 14; Hilar. Trin. 1, 28.