- airport
- air-raid shelter
- airship
- airsick
- airspace
- airspeed
- airstrip
- airtight
- airtime
- air-to-air
- air-traffic control
- air-traffic controller
- airwaves
- airy
- aisle
- ajar
- AK
- aka
- akin
- AL
- Alabama
- alabaster
- alacrity
- alarm
- alarm clock
- alarming
- alarmingly
- alarmist
- alas
- Alaska
- Albania
- Albanian
- albatross
- albeit
- Albert Hall
- Alberta
- albino
- album
- albumen
- alchemy
- alcohol
- alcoholic
- alcoholism
- alcove
- alder
- alderman
- ale
- alert
- Aleutian Islands
- Alexander technique
- Alexandria
- alfalfa
- alfresco
- algae
- Algarve
- algebra
- Algeria
- Algerian
- Algiers
- algorithm
- alias
- alibi
- alien
- alienate
- alienation
- alight
- align
- alignment
- alike
- alimentary canal
- alimony
- A-line
- alive
- alkali
- alkaline
- all
- all clear
- all right
- Allah
- all-around
- allay
- allegation
- allege
- alleged
- allegedly
- allegiance
- allegorical
- allegory
- alleluia
- allergic
- allergy
- alleviate
- alley
- alliance
- allied
- alligator
- all-important
- all-in
- all-in wrestling
- all-in-one
- alliteration
- all-night
- allocate
- allocation
- allot
- allotment
- all-out
- allow
- allowable
- allowance
- alloy
- all-powerful
- all-round
- all-rounder
- all-terrain vehicle
- all-time
- allude
- allure
- alluring
- allusion
- ally
- almanac
- almighty
- almond
- almond paste
- almost
- alms
- aloft
- alone
- along
- alongside
- aloof
- aloud
- alpaca
- alphabet
- alphabetical
- alphabetically
- alphabetize
- alphanumeric key
- alpine
- Alps
- already
- alright
- Alsace
- Alsatian
- also
- also-ran
- Alta.
- altar
- alter
- alter ego
- alteration
- altercation
- alternate
- alternately
- alternating current
- alternation
- alternative
- alternative medicine
- alternatively
- alternator
- although
- altitude
- alto
- altogether
- altruism
- altruistic
- aluminium
- alumnus
- always
- am
- AM
- AMA
- amalgam
- amalgamate
- amalgamation
- amass
- amateur
- amateurish
- amaze
- amazed
- amazement
- amazing
- amazingly
- Amazon
- Amazonian
- ambassador
- amber
- ambiance
- ambidextrous
- ambience
- ambiguity
- ambiguous
- ambiguously
- ambition
- ambitious
- ambivalence
- ambivalent
- amble
- ambulance