As nouns the difference between instructor and instructrix
is that instructor is one who instructs; a teacher while instructrix is (dated) a female instructor.
instructor
English
Alternative forms
* instructour (obsolete)
Noun
(
en noun)
One who instructs; a teacher
Synonyms
* instructer (much less common)
instructrix
English
Noun
(en-noun)
(dated) A female instructor.