propulsor
prōpulsor, ōris, m. [propello],
- one that wards off or drives back (post-class.): cornigeri pecudis, Venant. Vit. S. Mart. 3, 301.
defensores ecclesiarum, et ~ores injuriarum
prōpulsŏr, ōris, m. (propello), celui qui fait marcher devant soi : Fort. Mart. 3, 301.