One Word Substitution

A theist is a person who believes in the existence of a god or gods.

Somnambulist combines 'somnus' (sleep) and 'ambulare' (walk) to name someone who walks while asleep. Dreamer is too broad, ignorant is unrelated, and neomatic appears to be a misspelling of 'gnostic'.

A teetotaller is a person who never drinks alcohol.

A manuscript is a document that is written by hand rather than typed or printed.

A colony is a country or area under the full or partial political control of another country.

Flora refers to the plants of a particular region, habitat, or geological period.

A jockey is a person who rides in horse races, especially as a profession.

A philatelist is a person who studies or collects postage stamps.

An encyclopedia is a book or set of books giving information on many subjects or on many aspects of one subject.

 A man whose wife is dead is known as a widower. Hence, widower is correct.

Illegitimate refers to a child born to parents who are not married to each other.

Portable describes something that is easily carried or moved. Edible means fit to be eaten, potable means fit to be drunk, and bearable means able to be endured.

A draw is a contest or game that ends with no winner. Abandoned means left behind, postponed means delayed, and obsolete means no longer in use.

Extempore refers to something spoken or done without prior preparation. Elocution refers to the skill of clear and expressive speech, not the preparation level.

Unanimous means fully in agreement. Anonymous means having no known name, and obsolete means outdated.

An honorary position is one held without a salary, often as a mark of respect. Voluntary refers to doing something by choice, not necessarily without pay.

A polyglot is a person who knows or uses several languages. A linguist is a person who studies linguistics, the science of language.

Inaudible means impossible to hear. Audible is the opposite, and ineffaceable means impossible to erase.

An autopsy is a post-mortem examination of a body to determine the cause of death. A biopsy is the removal of tissue from a living body for examination.

A platitude is a remark or statement that has been used too often to be interesting or thoughtful. An epigram is a pithy saying or remark expressing an idea in a clever way.

Ornithology is the scientific study of birds. Philology is the study of language in oral and written historical sources.

A misanthrope is a person who dislikes humankind and avoids human society. A philanthropist is the opposite, someone who loves humanity.

An autobiography is an account of a person's life written by that person. A biography is written by someone else.

Fatal means leading to or causing death. Deadly is a synonym, but fatal is the standard term for a disease that ends in death.

An alien is a person who is not a citizen of the country in which they live, often considered a stranger. A recluse is someone who lives a solitary life.