Meaning: The first letter of the English alphabet.

Part of speech: the letter

Example: The word 'apple' starts with the letter A.

Category: Language

Meaning: Used to refer to a single item or person that is not specifically known.

Part of speech: article

Example: I saw a dog in the park.

Meaning: Short for 'air conditioning', a system used to cool indoor air.

Part of speech: noun

Example: The a/c in the office keeps everyone comfortable during the summer.

Meaning: A beginner level in language learning.

Part of speech: level

Example: She is studying English at the A1 level.

Category: Education › Language Learning

Meaning: An acronym for the basic elements of a subject, often used in education.

Part of speech: acronym

Example: Learning the ABCs is essential for children.

Category: Education › Literacy

Meaning: On the subject of; concerning.

Part of speech: preposition

Example: We talked about our plans for the weekend.

Category: General

Synonyms:

• regarding
• concerning

Meaning: At a higher level or layer than.

Part of speech: preposition

Example: The clouds are above the mountains.

Category: General

Synonyms:

• over
• higher than

Antonyms:

• below
• under

Meaning: Not present in a place or at an occasion.

Part of speech: adjective

Example: He was absent from school yesterday.

Category: General

Synonyms:

• missing
• away

Antonyms:

• present
• attending

Meaning: To agree to receive something offered.

Part of speech: verb

Example: I will accept your invitation.

Category: General

Synonyms:

• receive
• agree to

Antonyms:

• reject
• decline

Meaning: An expression of pain or disappointment.

Part of speech: interjection

Example: Ach! I forgot my keys again.

Category: Arts › Literature

Synonyms:

• ouch
• alas

Meaning: from one side to the other side of something

Part of speech: preposition

Example: She walked across the street.

Category: Language

Synonyms:

• over
• through

Antonyms: along

Meaning: the process of doing something

Part of speech: noun

Example: The action of the movie was thrilling.

Category: General

Synonyms:

• deed
• act

Antonyms: inaction

Meaning: a specific task or action

Part of speech: noun

Example: The activity was fun and engaging.

Category: General

Synonyms:

• task
• action

Antonyms: inaction

Meaning: a person who performs in plays, movies, or television

Part of speech: noun

Example: She is a talented actor.

Category: Arts › Theater

Synonyms:

• performer
• player

Meaning: a female performer in plays, movies, or television

Part of speech: noun

Example: She is a famous actress.

Category: Arts › Theater

Synonyms:

• female actor
• performer

Meaning: A short form of advertisement, often used to promote products or services.

Part of speech: noun

Example: I saw an ad for a new smartphone on TV.

Synonyms:

• advertisement
• commercial

Meaning: To join something to something else to increase the total.

Part of speech: verb

Example: Please add sugar to your tea.

Synonyms:

• combine
• include

Antonyms:

• subtract
• remove

Meaning: the process of combining numbers or quantities

Part of speech: noun

Example: Addition is one of the basic operations in math.

Category: Mathematics › Arithmetic

Synonyms:

• sum
• total

Antonyms: subtraction

Meaning: A person who is fully grown or developed, typically over the age of 18.

Part of speech: noun

Example: As an adult, she took responsibility for her own decisions.

Category: Education

Synonyms:

• grown-up
• mature person

Antonyms:

• child
• teenager

Meaning: A powered flying vehicle with fixed wings.

Part of speech: noun

Example: The aeroplane took off smoothly from the runway.

Category: Aviation › Aircraft

Synonyms:

• airplane
• plane

Meaning: feeling fear or anxiety

Part of speech: adjective

Example: She was afraid of the dark.

Category: Psychology › Emotions

Synonyms:

• scared
• frightened

Antonyms:

• brave
• confident

Meaning: following in time or order

Part of speech: preposition

Example: We will meet after lunch.

Category: Time › Chronology

Synonyms:

• following
• subsequent

Antonyms:

• before
• preceding

Meaning: the time of day between noon and evening

Part of speech: noun

Example: We will meet in the afternoon.

Category: Time › Parts of the Day

Synonyms:

• midday
• post-noon

Antonyms:

• morning
• evening

Meaning: plural of afternoon; times of day between noon and evening

Part of speech: noun

Example: I enjoy quiet afternoons at home.

Category: Time › Parts of the Day

Synonyms:

• middays
• post-noons

Meaning: once more; another time

Part of speech: adverb

Example: Can you say that again?

Category: Time › Frequency

Synonyms:

• once more
• anew

Antonyms:

• never
• not again

Meaning: the length of time that a person has lived

Part of speech: noun

Example: Her age is just a number.

Category: Time › Lifespan

Synonyms:

• years
• lifetime

Antonyms:

• youth
• childhood

Meaning: In the past; a specified time before the present.

Part of speech: adverb

Example: I visited Paris two years ago.

Category: Time › Past

Synonyms:

• previously
• before

Meaning: An expression of surprise or realization.

Part of speech: interjection

Example: Ah, I see what you mean now!

Meaning: An expression used to show that you have just understood something or realized something.

Part of speech: interjection

Example: Aha! Now I see what you mean.

Category: Arts

Meaning: A sound made when sneezing.

Part of speech: interjection

Example: He sneezed loudly and said, 'Ahchoo!'

Category: Health

Meaning: In front or in the future.

Part of speech: adverb

Example: We need to plan ahead for the trip.

Category: General

Synonyms: forward

Antonyms: behind

Meaning: Help or assistance.

Part of speech: noun

Example: The organization provides aid to those in need.

Category: Health

Synonyms: assistance

Antonyms: hindrance

Meaning: The invisible mixture of gases we breathe.

Part of speech: noun

Example: The air is fresh in the mountains.

Category: Science › Atmosphere

Synonyms: atmosphere

Meaning: A device that cools and dehumidifies air.

Part of speech: noun

Example: The air conditioner kept the room cool.

Category: Technology › HVAC

Synonyms: AC unit

Meaning: The branch of the military that conducts aerial warfare.

Part of speech: noun

Example: He serves in the air force.

Category: Military

Synonyms: aerial military

Meaning: Mail that is transported by aircraft.

Part of speech: noun

Example: She sent the letter by air mail.

Category: General

Synonyms: air delivery

Meaning: Any vehicle capable of flying, such as an airplane or helicopter.

Part of speech: noun

Example: The aircraft took off smoothly.

Category: Transportation › Aviation

Synonyms: plane

Meaning: A powered flying vehicle with wings.

Part of speech: noun

Example: The airplane took off smoothly.

Category: Transportation › Aviation

Synonyms:

• plane
• aeroplane

Meaning: A place where aircraft take off and land.

Part of speech: noun

Example: We arrived at the airport two hours early.

Category: Transportation › Aviation

Synonyms:

• airfield
• aerodrome

Meaning: The name of the letter 'H' in the English alphabet.

Part of speech: noun

Example: The teacher asked for the letter aitch.

Category: Language › Alphabet