Meaning: A device used for measuring or maintaining orientation, based on the principles of angular momentum.

Part of speech: noun

Example: The gyroscope helps stabilize the aircraft during flight.

Category: Technology › Engineering

Synonyms:

• stabilizer
• inclinometer

Meaning: a legal principle that protects against unlawful detention

Part of speech: noun

Example: The lawyer filed a habeas corpus petition for his client.

Category: Law › Criminal Law

Meaning: to make accustomed or used to

Part of speech: verb

Example: They were habituated to the noise of the city.

Category: Psychology

Synonyms:

• accustom
• adapt

Antonyms:

• unaccustom
• disaccustom

Meaning: the hairs along the back of an animal, especially a dog, that stand up when it is angry

Part of speech: noun

Example: The dog's hackles rose when it saw the stranger.

Category: Nature › Animal Behavior

Synonyms:

• bristles
• spines

Meaning: the ancient Greek god of the underworld

Part of speech: noun

Example: In mythology, Hades ruled over the dead.

Category: Mythology

Synonyms:

• underworld
• hell

Meaning: a report of the words or actions of the Prophet Muhammad

Part of speech: noun

Example: The Hadith is an important source of Islamic teachings.

Category: Religion › Islam

Meaning: a mineral form of iron oxide

Part of speech: noun

Example: Haematite is often used in jewelry.

Category: Science › Geology

Synonyms:

• iron ore
• mineral

Meaning: the study of blood and blood disorders

Part of speech: noun

Example: She specializes in haematology.

Category: Medicine › Blood Disorders

Synonyms:

• blood science
• hematology

Meaning: a localized collection of blood outside blood vessels

Part of speech: noun

Example: He developed a haematoma after the injury.

Category: Medicine › Injuries

Synonyms:

• bruise
• swelling

Meaning: a protein in red blood cells that carries oxygen

Part of speech: noun

Example: Haemoglobin levels are tested during a blood test.

Category: Medicine › Blood Health

Synonyms:

• blood protein
• oxygen carrier

Meaning: a genetic disorder that affects blood clotting

Part of speech: noun

Example: Haemophilia can lead to excessive bleeding.

Category: Medicine › Genetic Disorders

Synonyms:

• bleeding disorder
• clotting disorder

Meaning: a person who has haemophilia

Part of speech: noun

Example: The haemophiliac must take precautions to avoid injuries.

Category: Medicine › Genetic Disorders

Synonyms:

• bleeder
• clotting disorder patient

Meaning: excessive bleeding

Part of speech: noun

Example: The patient suffered a haemorrhage after the surgery.

Category: Medicine › Emergency Care

Synonyms:

• bleeding
• loss of blood

Meaning: relating to or characterized by bleeding

Part of speech: adjective

Example: Haemorrhagic fever can be very serious.

Category: Medicine › Emergency Care

Synonyms:

• bleeding
• hemorrhagic

Meaning: swollen veins in the lower rectum or anus

Part of speech: noun

Example: He was embarrassed to discuss his haemorrhoid problem.

Category: Medicine › Health

Synonyms: piles

Meaning: swollen veins in the lower rectum or anus

Part of speech: noun

Example: Haemorrhoids can cause discomfort and bleeding.

Category: Medicine › Digestive Health

Synonyms:

• piles
• swollen veins

Meaning: a chemical element with the symbol Hf

Part of speech: noun

Example: Hafnium is used in nuclear reactors.

Category: Science › Chemistry

Synonyms:

• element
• metal

Meaning: the handle of a tool or weapon

Part of speech: noun

Example: He gripped the haft of the sword tightly.

Category: Technology › Tools

Synonyms:

• handle
• grip

Meaning: an old woman, often with a negative connotation

Part of speech: noun

Example: The story featured a hag who cast spells.

Category: Folklore

Synonyms:

• witch
• crone

Meaning: a traditional Scottish dish made from sheep's offal

Part of speech: noun

Example: They served haggis at the Burns Night dinner.

Category: Food › Scottish Cuisine

Synonyms:

• dish
• food

Meaning: a writer of hagiographies, or biographies of saints

Part of speech: noun

Example: The hagiographer wrote about the life of a famous saint.

Category: Literature › Biography

Synonyms:

• biographer
• writer

Meaning: a biography of a saint or religious figure

Part of speech: noun

Example: The hagiography detailed the saint's miracles.

Category: Literature › Biography

Synonyms:

• biography
• life story

Meaning: a prayer in Christianity asking for the intercession of the Virgin Mary

Part of speech: noun

Example: They said a Hail Mary before the game.

Category: Religion › Christianity

Synonyms:

• prayer
• invocation

Meaning: a garment made of coarse material worn as a penance

Part of speech: noun

Example: He wore a hair shirt to show his repentance.

Category: Religion › Penance

Synonyms:

• sackcloth
• penitential garment

Meaning: involving very small or trivial differences

Part of speech: adjective

Example: His hair splitting arguments annoyed everyone.

Category: Language

Synonyms:

• nitpicking
• pedantic

Antonyms:

• general
• broad

Meaning: a very small distance or amount

Part of speech: noun

Example: He missed the target by a hair's breadth.

Category: Measurement

Synonyms:

• narrow margin
• slight distance

Meaning: Calm, peaceful, and happy.

Part of speech: adjective

Example: They reminisced about the halcyon days of their youth.

Category: Literature

Synonyms:

• tranquil
• serene

Antonyms:

• chaotic
• stormy

Meaning: The time required for half of a substance to decay or be eliminated.

Part of speech: noun

Example: The half-life of this radioactive material is ten years.

Category: Science › Physics

Synonyms: decay time

Meaning: A former British coin worth half a penny.

Part of speech: noun

Example: He found a halfpenny on the street.

Category: Finance › Currency

Synonyms: coin

Meaning: A place that helps people transition from a difficult situation.

Part of speech: noun

Example: He stayed at a halfway house after rehab.

Category: Social Services

Synonyms: transitional home

Meaning: Regarded as holy or sacred.

Part of speech: adjective

Example: The hallowed ground is a site of historical significance.

Category: Religion

Synonyms:

• sacred
• holy

Antonyms: unholy

Meaning: To see or hear something that is not present.

Part of speech: verb

Example: He began to hallucinate after being awake for too long.

Category: Psychology › Mental Health

Synonyms:

• perceive
• imagine

Meaning: An experience of seeing or hearing something that is not there.

Part of speech: noun

Example: The patient reported a hallucination of a voice.

Category: Psychology › Mental Health

Synonyms:

• illusion
• delusion

Meaning: Related to hallucinations; causing hallucinations.

Part of speech: adjective

Example: The drug had hallucinatory effects.

Category: Psychology › Mental Health

Synonyms: delusional

Meaning: A substance that causes hallucinations.

Part of speech: noun

Example: LSD is a well-known hallucinogen.

Category: Medicine › Drugs

Synonyms: psychedelic

Meaning: Causing hallucinations.

Part of speech: adjective

Example: The hallucinogenic properties of the mushroom are well-documented.

Category: Medicine › Drugs

Synonyms: psychedelic

Meaning: A circle of light appearing to surround the sun or moon.

Part of speech: noun

Example: The halo around the moon was beautiful.

Category: Nature › Astronomy

Synonyms:

• aura
• glow

Meaning: A form of ritual suicide by disembowelment, practiced by samurai.

Part of speech: noun

Example: Hara-kiri was seen as an honorable way to die.

Category: Culture › Traditions

Synonyms:

• seppuku
• ritual suicide

Meaning: An official in charge of a harbour and its operations.

Part of speech: noun

Example: The harbourmaster ensured all ships were safely docked.

Category: Business

Synonyms:

• port authority
• dockmaster

Meaning: Physical work that is difficult and tiring.

Part of speech: noun

Example: He was sentenced to hard labour for his crimes.

Category: Law › Criminal Law

Synonyms:

• manual labor
• physical work