One Word Substitution

A synod is a council or assembly of clergymen for discussion and decision-making. A dean is a clergyman rank, halo is divine symbol, chaplain is religious representative, so 'Synod' is correct.

Divorce is the legal dissolution of marriage. A celibate is unmarried, bigamist has two spouses, widower's spouse died, so 'Divorce' is the correct term.

A volunteer offers services freely without compulsion or payment. A recruit is enlisted, hermit lives secluded, so 'Volunteer' correctly describes free-will service.

A mountebank is a person who pretends to have great knowledge or skill. A coxswain steers boats, linguist studies languages, mimic imitates, so 'Mountebank' is correct.

Cicatrix is the medical term for a scar remaining after wound healing. Antidote counteracts poison, immune means resistant, so 'Cicatrix' is correct.

Culex is the mosquito genus that transmits filarial parasites. Fumigate is pest control, anaemia is blood condition, prognosis is medical prediction, so 'Culex' is correct.

Orology is the scientific study of mountains. Philology studies language, astronomy studies celestial bodies, so 'Orology' is the correct substitute.

A mausoleum is an elaborate, expensive free-standing tomb building. A crypt is an underground burial chamber (often beneath a church), while obituary is a death notice in a newspaper.

A requiem is a mass or musical composition for the dead, specifically in the Catholic tradition. Fratricide is killing one's brother, and suicide is self-killing.

Geology is the scientific study of Earth's solid materials including rocks and soils. Botany studies plants, oology studies eggs, and biology studies living organisms broadly.

Surveying is the art and technique of measuring land and establishing boundaries. Mensuration is the mathematical branch of measuring geometric quantities, while agriculture is farming practice.

Divine means connected with, coming from, or caused by God or Goddess.

Zoology is the study of animals.

Illiterate is used for a person who is unable to read or write.