Profesion or Profession: How To spell?

The word Profesion is misspelled against Profession, a verb meaning "That of which one professed knowledge; the occupation, if not mechanical, agricultural, or the like, to which one devotes one's self; the business which one professes to understand, and to follow for subsistence; calling; vocation; employment; as, the profession of arms; the profession of a clergyman, lawyer, or physician; the profession of lecturer on chemistry."