- a
- a. a. michelson
- a. a. milne
- a. conan doyle
- a. e. burnside
- a. e. housman
- a. e. kennelly
- a. e. w. mason
- a. noam chomsky
- a. testudineus
- a.d.
- a.e.
- a.k.a.
- a.m.
- a battery
- a bit
- a capella singing
- a cappella
- a cappella singing
- a couple of
- a few
- a fortiori
- a good deal
- a great deal
- a horizon
- a hundred times
- a kempis
- a la carte
- a la mode
- a level
- a little
- a lot
- a million times
- a posteriori
- a priori
- a trifle
- aa
- aaa
- aachen
- aah
- aaland islands
- aalborg
- aalii
- aalst
- aalto
- aar
- aardvark
- aardwolf
- aare
- aare river
- aarhus
- aaron
- aaron burr
- aaron copland
- aaron montgomery ward
- aaron's rod
- aarp
- aas
- aave
- ab
- ab initio
- aba
- aba transit number
- abaca
- abacinate
- aback
- abactinal
- abacus
- abadan
- abaft
- abalone
- abamp
- abampere
- abandon
- abandoned
- abandoned infant
- abandoned person
- abandoned ship
- abandonment
- abarticulation
- abase
- abasement
- abash
- abashed
- abashment
- abasia
- abasia trepidans
- abasic
- abatable
- abatable nuisance
- abate
- abatement
- abatement of a nuisance
- abatic
- abatis
- abator
- abattis
- abattoir
- abaxial
- abaxially
- abaya
- abb
- abbacy
- abbatial
- abbe
- abbe condenser
- abbess
- abbey
- abbot
- abbott lawrence lowell
- abbreviate
- abbreviated
- abbreviation
- abbreviator
- abc
- abcoulomb
- abcs
- abc's
- abdias
- abdicable
- abdicate
- abdication
- abdicator
- abdomen
- abdominal
- abdominal actinomycosis
- abdominal aorta
- abdominal aortic aneurysm
- abdominal breathing
- abdominal cavity
- abdominal delivery
- abdominal external oblique muscle
- abdominal muscle
- abdominal nerve plexus
- abdominal pregnancy
- abdominal wall
- abdominocentesis
- abdominoplasty
- abdominous
- abdominousness
- abdominovesical
- abduce
- abducens
- abducens muscle
- abducens nerve
- abducent
- abducent nerve
- abduct
- abducting
- abduction
- abductor
- abductor muscle
- abeam
- abecedarian
- abecedarius
- abed
- abel
- abel janszoon tasman
- abel tasman
- abelard
- abele
- abelia
- abelian group
- abelmoschus
- abelmoschus esculentus
- abelmoschus moschatus
- abelmosk
- abenaki
- aberdare
- aberdeen
- aberdeen angus
- aberdonian
- aberrance
- aberrancy
- aberrant
- aberrate
- aberration
- abet
- abetalipoproteinemia
- abetment
- abettal
- abetter
- abettor
- abeyance
- abeyant
- abfarad
- abhenry
- abhor
- abhorrence
- abhorrent
- abhorrer
- abidance
- abide
- abide by
- abiding
- abidjan
- abience
- abient
- abies
- abies alba