A person who studies stars and planets?

An astronomer is a scientist who studies celestial bodies such as stars, planets, and galaxies.

Someone who loves and supports their country?

A patriot is someone who feels a strong support and love for their country.

A person who is new to a job or activity?

A novice is someone who is new to a job, activity, or field and lacks experience.

A person who walks on ropes high above the ground at a circus?

An acrobat is a person skilled in feats of agility and balance, often performing in a circus.

A person who is concerned with practical matters and rules rather than theory or ethics?

A pragmatist focuses on practical approaches and solutions rather than theoretical or ethical considerations.

A person who is very skilled at something?

An expert is someone who has a high level of skill or knowledge in a particular field.

A person who is against war and violence?

A pacifist is someone who opposes war and violence and advocates for peace.

A person who compiles dictionaries?

A lexicographer is a person who compiles dictionaries.

A person who collects stamps?

A philatelist is a person who collects and studies stamps.

A person who is unable to pay their debts?

A bankrupt is a person who is legally declared unable to pay their debts.

A person who studies ancient societies and artifacts?

An archaeologist studies ancient societies and artifacts through the recovery and analysis of material culture.

A person who spends too much money?

A spendthrift is a person who spends money extravagantly and is often wasteful.

A person who travels to a holy place for religious reasons?

A pilgrim is a person who travels to a holy place for religious reasons.

A person who lives in a foreign country permanently?

An immigrant is a person who comes to live permanently in a foreign country.

A person who secretly listens to private conversations?

An eavesdropper is someone who secretly listens to private conversations.

A person who believes in fate or destiny.

A fatalist is someone who believes that all events are predetermined and therefore inevitable.

A person who speaks many languages.

A polyglot is an individual who knows and is able to use several languages.

A person who draws maps.

A cartographer is a person who creates maps.

A person who lives alone and avoids people.

A recluse is someone who lives a solitary life and avoids the company of others.

A person who pretends to be what they are not.

A hypocrite is someone who behaves in a way that contradicts what they claim to believe or feel.

A person who cannot read or write.

An illiterate person is unable to read or write.

A person who treats teeth and gums.

A dentist is a medical professional who specializes in dentistry, the diagnosis, prevention, and treatment of diseases and conditions of the oral cavity.

A person who loves books.

A bibliophile is someone who loves books, often collecting or admiring them.

A person who doubts everything.

A skeptic is someone who habitually doubts accepted beliefs and is willing to question any statement.

A person who eats too much.

A glutton is a person who eats and drinks excessively or voraciously.

A person who steals.

A thief is someone who takes another person's property without permission or legal right.

A person who gives money for a good cause.

A philanthropist is someone who seeks to promote the welfare of others, especially by donating money to good causes.

A person who is always hopeful.

An optimist is someone who tends to expect the best possible outcome or dwell on the most hopeful aspects of a situation.

A person who loves himself too much.

An egoist is a person who is excessively self-centered or selfish.

A person who is very talkative.

A garrulous person is someone who talks a lot, often about trivial or unimportant things.

A person who studies weather.

A meteorologist is a scientist who studies the atmosphere to understand and predict weather and climate.

A person who repairs water pipes.

A plumber is a tradesperson who specializes in installing and maintaining systems used for potable (drinking) water, sewage, and drainage.

A person who writes plays.

A playwright is someone who writes plays.

A person who is always alone by choice.

A loner is someone who prefers to avoid the company of others and spends time alone by choice.

A person who welcomes guests.

A host is a person who receives or entertains guests at home or elsewhere.

A person who serves food at a restaurant.

A waiter is a person who serves food and drinks at a restaurant.

A person who investigates crimes.

A detective is an investigator, usually a member of a law enforcement agency, who investigates crimes.

A person who leads a group or organization.

A leader is someone who leads or commands a group, organization, or country.

A person who takes care of a museum.

A curator is a person who is in charge of the items in a museum or art gallery.

A person who loves nature.

A naturalist is someone who studies or is an expert in natural history, especially in wildlife.

A person who makes and sells medicines.

A chemist, in this context, refers to a pharmacist who prepares and sells medicinal drugs.

A person who designs buildings.

An architect is a person who designs buildings and in many cases also supervises their construction.

A person who governs a state.

A governor is an official who is the head of a state or province.

A person who advises legal matters.

A lawyer is a professional who is qualified to offer advice about the law or represent someone in legal matters.

A person who directs a film.

A director is responsible for overseeing the creative aspects of a film, including controlling the content and flow of the film's plot.

A person who studies rocks and earth.

A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets.

A person who writes poems.

A poet is a person who writes poems.

A person who cuts men’s hair.

A barber is a person whose occupation is mainly to cut, dress, groom, style and shave men's and boys' hair.

A person who delivers letters.

A postman is a person who delivers mail as a part of their job.

A person who studies animal life.

A zoologist is a scientist who studies animals and animal life.