praeses

(declension-3, feminine, masculine) sitting before (usually to guard or take care of something or someone), presider
(declension-3, feminine, masculine) protector, guard, guardian, defender
(declension-3, feminine, masculine) head, chief, ruler

From praesideō + -s, from sedeō.

propugnatrix

Πρόεδρος

υπερασπιστής

υπέρμαχος

prezydent

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