preceptor vs instructor

preceptor and instructor both are nouns.

Word	Noun	Adjective	Verb	Adverb
preceptor	Yes	No	No	No
instructor	Yes	No	No	No

As nouns, instructor is a hypernym of preceptor; that is, instructor is a word with a broader meaning than preceptor:

preceptor: teacher at a university or college (especially at Cambridge or Oxford)
instructor: a person whose occupation is teaching

Other hypernyms of preceptor include teacher.

preceptor (noun)	instructor (noun)
teacher at a university or college (especially at Cambridge or Oxford)	a person whose occupation is teaching