- a.
- a
- a
- A
- a cappella
- à la mode
- A. N. Other
- a priori
- a tempo
- A to Z
- A-1
- 3-D
- A4
- AA
- AAA
- Aachen
- aardvark
- Aargau
- aargh
- AAUP
- AB
- aback
- abacus
- abaft
- abalone
- abandon
- abandoned
- abandonment
- abase
- abasement
- abashed
- abate
- abatement
- abattoir
- abaxial
- abbess
- abbey
- abbot
- abbr
- abbreviate
- abbreviated
- abbreviation
- ABC
- abdicate
- abdication
- abdomen
- abdominal
- abdominoplasty
- abduct
- abduction
- abductor
- abed
- aberrant
- aberration
- abet
- abeyance
- abhor
- abhorrence
- abhorrent
- abide
- abiding
- ability
- abiotic
- abject
- abjectly
- abjure
- Abkhazia
- ablation
- ablative
- ablaut
- ablaze
- able
- able-bodied
- able-bodied seaman
- ablutions
- ably
- abnegate
- abnegation
- abnormal
- abnormality
- abnormally
- abo
- aboard
- abode
- abolish
- abolition
- abolitionism
- abolitionist
- abominable
- abominable snowman
- abominably
- abominate
- abomination
- aboriginal
- aborigine
- abort
- abortifacient
- abortion
- abortionist
- abortive
- abound
- about
- about-turn
- above
- above-average
- aboveboard
- aboveground
- above-mentioned
- above-named
- above-the-line
- abracadabra
- abrade
- Abraham
- abrasion
- abrasive
- abreact
- abreaction
- abreast
- abridge
- abridged
- abroad
- abrogate
- abrogation
- abrupt
- abruptly
- abruptness
- ABS
- Absalom
- abscess
- abscissa
- abscond
- absconder
- abseil
- abseiling
- absence
- absent
- absentee
- absenteeism
- absently
- absent-minded
- absent-mindedly
- absent-mindedness
- absinthe
- absolute
- absolute majority
- absolute pitch
- absolute zero
- absolutely
- absolution
- absolutism
- absolutist
- absolve
- absorb
- absorbency
- absorbent
- absorbent cotton
- absorbing
- absorption
- abstain
- abstainer
- abstemious
- abstemiousness
- abstention
- abstinence
- abstinent
- abstract
- abstract expressionism
- abstracted
- abstractedly
- abstraction
- abstruse
- abstruseness
- absurd
- absurdity
- absurdly
- ABTA
- Abu Dhabi
- abulia
- abundance
- abundant
- abundantly
- abuse
- abuse of privilege
- abuser
- abusive
- abusively
- abut
- abutment
- abuzz
- abysmal
- abysmally
- abyss
- abyssal
- Abyssinia
- Abyssinian
- a/c
- AC
- acacia
- academia
- academic