Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class VI. Words Relating to the Sentient and Moral Powers
Section V. Religious Affections
2. Religious Doctrines

983a. Orthodoxy.

   NOUN:ORTHODOXY; strictness, soundness, religious truth, true faith; truth [See Truth]; soundness of doctrine.
  Christianity, Christianism; Catholicism, Catholicity; “the faith once delivered to the saints”; hyperorthodoxy [See Heterodoxy].
  THE CHURCH, Holy Church, Church Militant, Church Triumphant; Catholic -, Universal -, Apostolic -, Established- Church; the Bride of the Lamb; temple of the Holy Ghost; Church -, body -, members -, disciples -, followers- of Christ; Christians.
  true believer; textualist, textuary; canonist (theologian) [See Theology]; the Orthodox; Christian community; Christendom, collective body of Christians.
  CANONS (belief) [See Belief]; thirty-nine articles; Apostles’ -, Nicene -, Athanasian- Creed; Church Catechism.
   ADJECTIVE:ORTHODOX, sound, strict, faithful, catholic, schismless, Christian, evangelical, scriptural, literal, divine, mono theistic, theistic; true [See Truth]; true blue.
  1. Of the true faith.
  2. Ever the fiery Pentecost Girds with one flame the countless host.—Emerson
  3. Odinism was valor; Christianism was humility, another kind of valor.—Carlyle
  4. Prove their doctrine orthodox By apostolic blows and knocks.—Butler
  5. Orthodoxy is my doxy; heterodoxy another man’s doxy.—Warburton
  6. Orthodoxy is the Bourbon of the world of thought; it learns not, neither can it forget.—Huxley
  7. The Church … the world-tree of the nations for so long!—Carlyle