bibliothec vs librarian

bibliothec and librarian both are nouns.

Word	Noun	Adjective	Verb	Adverb
bibliothec	Yes	No	No	No
librarian	Yes	No	No	No

As nouns, bibliothec and librarian are synonyms defined as:

bibliothec and librarian: a professional person trained in library science and engaged in library services

bibliothec (noun)	librarian (noun)
a professional person trained in library science and engaged in library services	a professional person trained in library science and engaged in library services