One Word Substitution

Hagiology is the study or literature concerning the lives and legends of saints.

Eschatology is the part of theology concerned with death, judgment, and the final destiny of the soul and of humankind.

Ontology is the branch of metaphysics that studies the nature of being, existence, or reality. Mythology deals with myths, papyrology with ancient documents, and penology with the punishment of crime.

Numismatics is the scientific study or collection of currency, including coins, tokens, and medals. Ecclesiology is the study of church affairs, while Egyptology is the study of ancient Egypt.

A malefactor is a person who commits a crime or does evil. An oculist is an eye doctor, a pugilist is a boxer, and a nanny is a child caregiver.

An apothecary is a historical term for a person who prepared and sold medicines and drugs. An acrobat performs physical feats, a drover moves livestock, and an emissary is a diplomatic representative.

A nihilist is a person who believes that life is meaningless and that nothing has intrinsic value or existence. A bigamist is someone married to two people, and an eccentric is someone unconventional.

Calisthenics are gymnastic exercises designed to achieve bodily fitness and grace of movement. Calligraphy is the art of beautiful handwriting, and epigraphy is the study of inscriptions.

A sycophant is a person who acts obsequiously toward someone important to gain advantage. A puritan is someone with strict moral beliefs, and a glutton is someone who eats excessively.

Cartography is the science or practice of drawing maps. Chiromancy is palmistry, ethnology is the study of cultures, and dendrology is the study of trees.

A vanquisher is one who defeats an enemy or opponent. A vandalizer destroys property, a voluptuary pursues luxury, and a votary is a devoted follower.

A snob is a person who believes they are superior to others based on status, wealth, or intellect. Option B uses the non-standard form 'snobber', but it is the intended answer.

A pallbearer is one of several people who help carry a coffin at a funeral. A notary is a legal official, and a brazier is a metal container for burning coals.

A musketeer is a soldier armed with a musket, which is a type of light gun. A muleteer drives mules, and a pedlar sells goods.

Dendrology is the scientific study of trees and woody plants. Epistemology is the study of knowledge, and eulogy is a speech in praise of someone deceased.

Horology is the study or science of time and timekeeping. Hymnology is the study of hymns, and graphology is the study of handwriting.

 Gaol is jail.

To chastise is to rebuke or punish severely. A mentor guides others, and to hone is to sharpen.

A racketeer is a person who engages in dishonest or fraudulent business schemes. A jurist is an expert in law, and a lutenist plays the lute.

A chauffeur is a person employed to drive a private car. A diarist keeps a diary, and a misanthrope dislikes people.

A chore is a routine or tedious task. A punster makes puns, and a prank is a mischievous act.

An Infallible person is incapable of making errors. Napstier is not a valid word, Jostler shoves roughly, Snicker means quiet laugh.

To chuckle is to laugh quietly or inwardly. To nibble is to eat in small bites, and to grope is to search blindly.