- a
- a
- à la carte
- A level
- A road
- A to Z
- a.
- a.m.
- a.s.a.p.
- A-1
- A4
- AA
- AAA
- AAUP
- AB
- AB
- aback
- abacus
- abandon
- abandoned
- abashed
- abate
- abattoir
- abbess
- abbey
- abbot
- abbreviate
- abbreviation
- ABC
- abdicate
- abdication
- abdomen
- abdominal
- abduct
- abduction
- aberration
- abet
- abeyance
- abhor
- abhorrent
- abide
- abiding
- ability
- abject
- ablaze
- able
- able-bodied
- ablutions
- ably
- ABM
- abnormal
- abnormality
- abnormally
- aboard
- abode
- abolish
- abolition
- A-bomb
- abominable
- abominable snowman
- abominably
- aborigine
- abort
- abortion
- abortive
- abound
- about
- about-turn
- above
- aboveboard
- abracadabra
- abrasion
- abrasive
- abreast
- abridged
- abroad
- abrupt
- abruptly
- ABS
- abscess
- abscond
- abseil
- absence
- absent
- absentee
- absenteeism
- absent-minded
- absent-mindedly
- absinth
- absolute
- absolute majority
- absolutely
- absolution
- absolve
- absorb
- absorbent
- absorbing
- absorption
- abstain
- abstemious
- abstention
- abstinence
- abstract
- abstraction
- abstruse
- absurd
- absurdity
- absurdly
- ABTA
- Abu Dhabi
- abundance
- abundant
- abundantly
- abuse
- abusive
- abut
- abysmal
- abysmally
- abyss
- Abyssinia
- Abyssinian
- AC
- a/c
- acacia
- academic
- academic year
- academy
- ACAS
- accede
- accelerate
- acceleration
- accelerator
- accelerator board
- accent
- accentuate
- accept
- acceptable
- acceptably
- acceptance
- accepted
- access
- access road
- access time
- accessibility
- accessible
- accession
- accessory
- accident
- accidental
- accidentally
- accident-prone
- acclaim
- acclamation
- acclimatize
- accolade
- accommodate
- accommodating
- accommodation
- accommodations
- accompaniment
- accompanist
- accompany
- accomplice
- accomplish
- accomplished
- accomplishment
- accord
- accordance
- according to
- accordingly
- accordion
- accordionist
- accost
- account
- accountability
- accountable
- accountancy
- accountant
- accounting
- accounts department
- accoutrements
- accredited
- accrue
- accumulate
- accumulation
- accuracy
- accurate
- accurately
- accusation
- accuse
- accused
- accusing
- accusingly
- accustomed
- ace
- acerbic
- acetate
- acetic acid
- acetone
- acetylene