From The Collaborative International Dictionary of English v.0.44 [gcide]:
3. 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.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
96 Moby Thesaurus words for "profession": acceptance, acknowledgment, admission, affidavit, affirmance, affirmation, allegation, allowance, announcement, annunciation, appreciation, art, assertion, asseveration, attest, attestation, averment, avouchment, avowal, business, calling, career, career building, careerism, claim, compurgation, concession, conclusion, confession, confession of faith, craft, creed, declaration, declaration of faith, deposition, dictum, disclosure, employment, enunciation, field, game, handicraft, instrument in proof, ipse dixit, job, legal evidence, lifework, line, line of business, line of work, manifesto, metier, mission, mystery, number, occupation, position, position paper, positive declaration, post, practice, predicate, predication, proclamation, pronouncement, proposition, protest, protestation, pursuit, racket, recognition, say, say-so, saying, situation, specialization, specialty, sphere, stance, stand, statement, sworn evidence, sworn statement, sworn testimony, testimonial, testimonium, testimony, trade, utterance, vocation, vouch, walk, walk of life, witness, word, work
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