vānĭlŏquentĭa — Lewis & Short
vānĭlŏquentĭa, ae, f.vaniloquus,
I empty or idle talk, prating, vaunting (rarely;
not in Cic.),Plaut. Rud. 4, 1, 14:
hac vaniloquentiā primum Aristaenum praetorem Achaeorum excitavit,Liv. 34, 24, 1; Tac. A. 3, 49; 6, 31.—Plur., Jul. Val. Rer. Gest. Alex. 2, 10.