-or
Nouns ending in -or are almost always der.
Names a person.The words came from Latin.
Examples
- der Projektor
- der Senior
- der Motor
- der Doktor
- der Professor
- der Traktor
Plural
- der Professor → die Professoren
Exceptions
das Labor is short for Laboratorium and das Dekor came through French. Both stayed neuter.
- das Labor
- das Dekor
Same letters, different ending
- das Tor
- das Moor
- der Chor