Regicide

Elegy

Claustrophobia

A child born after the death of his father is called ‘Posthumous’.

epitaph

Misanthrope

garrison

Expiate

Apprentice

Posthumous

Slobbered

The one-word substitution is Apostle.

Apothecary: a person who prepared and sold medicines and drugs.
Apotheosis: the highest point in the development of something; a culmination or climax.
Renegade: a person who deserts and betrays an organization, country, or set of principles.
Apostle: a vigorous and pioneering advocate or supporter of a particular policy, idea, or cause.

Plutocracy – government by the wealthy

inquest- a judicial inquiry to ascertain the facts relating to an incident.

Atheist – a person who disbelieves or lacks belief in the existence of God or gods.

somniloquist –  is – one who talks in his sleep.

impromptu- done without being planned or rehearsed

Oligarchy – a small group of people having control of a country or organization.

Introspection – the examination or observation of one’s own mental and emotional processes

Arbitrator- an independent person or body officially appointed to settle a dispute.

Epidemic – a widespread occurrence of an infectious disease in a community at a particular time.

Entomologist – a person who studies or is an expert in the branch of zoology concerned with insects.

Polygamy – the practice or custom of having more than one wife or husband at the same time.

Stoic – the endurance of pain or hardship without the display of feelings and without complaint.

Fatalist- someone who believes that people cannot change the way events will happen and that events, especially bad ones, cannot be avoided

Atheist- a person who disbelieves or lacks belief in the existence of God or gods

Legislature- the legislative body of a country or state

Martyr – a person who is killed because of their religious or other beliefs.

Autobiography – an account of a person’s life written by that person.

Morgue – a mortuary.