The Collaborative International Dictionary of English v.0.48:

Creed \Creed\, v. t.
   To believe; to credit. [Obs.]
   [1913 Webster]

         That part which is so creeded by the people. --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Creed \Creed\ (kr[=e]d), n. [OE. credo, crede, AS. creda, fr. L.
   credo I believe, at the beginning of the Apostles' creed, fr.
   credere to believe; akin to OIr. cretim I believe, and Skr.
   [,c]raddadh[=a]mi; [,c]rat trust + dh[=a] to put. See Do,
   v. t., and cf. Credo, Grant.]
   1. A definite summary of what is believed; esp., a summary of
      the articles of Christian faith; a confession of faith for
      public use; esp., one which is brief and comprehensive.
      [1913 Webster]

            In the Protestant system the creed is not coordinate
            with, but always subordinate to, the Bible.
                                                  --Schaff-Herzog
                                                  Encyc.
      [1913 Webster]

   2. Any summary of principles or opinions professed or adhered
      to.
      [1913 Webster]

            I love him not, nor fear him; there's my creed.
                                                  --Shak.
      [1913 Webster]

   Apostles' creed, Athanasian creed, Nicene creed. See
      under Apostle, Athanasian, Nicene.
      [1913 Webster]

WordNet (r) 3.0 (2006):

creed
    n 1: any system of principles or beliefs [syn: creed, credo]
    2: the written body of teachings of a religious group that are
       generally accepted by that group [syn: religious doctrine,
       church doctrine, gospel, creed]

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "creed":
   Athanasian Creed, Catechism, Nicene Creed, Weltanschauung,
   affirmance, affirmation, allegation, announcement, annunciation,
   articles of faith, articles of religion, assertion, asseveration,
   averment, avouchment, avowal, belief, catechism, church, communion,
   conclusion, connection, course, credenda, credo, cult, declaration,
   denomination, dictum, doctrinal statement, doctrine, dogma,
   enunciation, faith, formulated belief, gospel, guiding principles,
   ideology, ipse dixit, ism, line, manifesto, orthodoxy, persuasion,
   plan of action, platform, policy, political faith,
   political philosophy, polity, position, position paper,
   positive declaration, predicate, predication, principles,
   procedure, proclamation, profession, pronouncement, proposition,
   protest, protestation, religion, religious belief, religious faith,
   say, say-so, saying, school, sect, stance, stand, statement,
   system of belief, system of beliefs, teaching, tenet, theology,
   tradition, utterance, vouch, weltanschauung, word, world view