profession

(noun) the body of people in a learned occupation. Examples: "The news spread rapidly through the medical profession." "They formed a community of scientists."

(noun) an occupation requiring special education (especially in the liberal arts or sciences).

(noun) an open avowal (true or false) of some belief or opinion. Synonyms: professing. Example: "A profession of disagreement."

(noun) affirmation of acceptance of some religion or faith. Example: "A profession of christianity."