professor vs academician

professor and academician both are nouns.

Word	Noun	Adjective	Verb	Adverb
professor	Yes	No	No	No
academician	Yes	No	No	No

As nouns, academician is a hypernym of professor; that is, academician is a word with a broader meaning than professor:

professor: someone who is a member of the faculty at a college or university
academician: an educator who works at a college or university

Other hypernyms of professor include academic, faculty member.

professor (noun)	academician (noun)
someone who is a member of the faculty at a college or university	an educator who works at a college or university
	a scholar who is skilled in academic disputation
	someone elected to honorary membership in an academy