- apivorous
- APL
- A place for everything and everything in its place
- aplacental
- aplacophoran
- aplanatic
- aplanetic
- aplanogamete
- aplanospore
- aplasia
- aplastic
- aplastic anemia
- aplenty
- aplite
- aplomb
- apmt.
- apnea
- apneic
- apneusis
- apneustic
- apnoea
- Apo
- apo-
- apoapsis
- Apoc.
- apocalypse
- Apocalypse
- apocalyptic
- apocalypticism
- apocalyptist
- apocarp
- apocarpous
- apocatastasis
- apocenter
- apochromat
- apochromatic
- apocopate
- apocope
- apocrine
- apocrypha
- Apocrypha
- apocryphal
- Apocryphal Gospels
- apocynaceous
- apocynthion
- apodal
- apodeictic
- apodeipnon
- apodema
- apodeme
- apodictic
- apodosis
- apodous
- apoenzyme
- apoferritin
- apogamy
- apogee
- apogeotropism
- apograph
- à point
- apokatastasis
- apolipoprotein
- apolitical
- Apollinaire
- Apollinaris
- apollo
- Apollo
- Apollo 11
- Apollo asteroid
- Apollo Belvedere
- Apollonian
- Apollonius Dyscolus
- Apollonius of Perga
- Apollonius of Rhodes
- Apollo program
- Apollyon
- apologetic
- apologetics
- apologia
- Apologia pro Vita Sua
- apologist
- apologize
- apologue
- apology
- apolune
- apomict
- apomixis
- apomorphine
- apomorphy
- aponeurosis
- apopemptic
- apophasis
- apophenia
- Apophis
- apophony
- apophthegm
- apophyge
- apophyllite
- apophysis
- apoplast
- apoplectic
- apoplectiform
- apoplexy
- apoprotein
- apoptosis
- apopyle
- aporia
- aport
- aposematic
- aposematic coloration
- aposiopesis
- apospory
- apostasy
- apostate
- apostatize
- a posteriori
- apostil
- apostilb
- apostle
- apostlebird
- apostle bird
- Apostle pitcher
- apostle plant
- Apostles, the Twelve
- Apostles' Creed
- apostleship
- apostle spoon
- Apostle spoon
- apostolate
- apostolic
- apostolic age
- Apostolic Church
- apostolic delegate
- Apostolic Fathers
- Apostolic See
- apostolic succession
- Apostolic succession
- Apostolos
- apostrophe
- apostrophize
- apothecaries' measure
- apothecaries' weight
- apothecary
- apothecary jar
- apothecium
- apothegm
- apothem
- apotheosis
- apotheosize
- apotropaic
- apotropaism
- app
- app.
- appal
- Appalachia
- Appalachian
- Appalachian dulcimer
- Appalachian Mountains
- Appalachian Spring
- Appalachian tea
- Appalachian Trail
- appall
- appalled
- appalling
- Appaloosa
- appam
- appanage
- appar.
- apparat
- apparatchik
- apparatus
- apparatus criticus
- apparel
- apparent
- apparent candlepower
- apparentement
- apparently
- apparent magnitude
- apparent movement
- apparent solar day
- apparent temperature
- apparent time
- apparent wind
- apparition
- apparitor
- appassionato
- appd.
- appeal
- appealing
- appeal play
- appear
- appearance
- appearance money
- appear as
- appease
- appeasement
- appel
- Appel
- appellant
- appellate
- appellate division
- appellation
- appellation contrôlée
- appellative
- appellee
- appellor
- append
- appendage
- appendant
- appendectomy
- appendiceal
- appendicectomy
- appendices
- appendicitis
- appendicle
- appendicular
- appendiculate
- appendix
- appendixes
- appentice
- Appenzell
- Appenzell Ausser Rhoden
- appenzeller
- Appenzell Inner Rhoden
- apperceive
- apperception
- appersonation
- appertain
- appestat
- appetence
- appetency
- appetite
- appetitive
- appetitive behavior
- appetizer
- appetizing
- Appia
- Appian Way
- appl.
- applanate
- applaud
- applaudable
- applause
- apple
- apple a day
- apple bee
- apple blight
- apple blossom
- apple box
- apple brandy
- apple butter
- Appleby
- applecart
- appledrain
- apple green
- Apple Islander
- Apple Isle
- applejack
- appleknocker
- apple maggot
- apple of discord
- apple of one's eye
- apple of Peru
- apple pandowdy
- apple-pie
- apple-pie bed
- apple-pie order
- apple-polish
- apple polisher
- apples
- apples and oranges
- apples and pears
- applesauce
- apple sauce
- Appleseed
- Appleseed, Johnny
- Apples of the Hesperides
- apple sucker
- applet
- Appleton
- Appleton layer
- apple tree borer
- Apple Valley
- appley
- appliance
- appliance garage
- applicability
- applicable
- applicant
- application
- application program
- applications package
- applicative
- applicator
- applicatory
- applied
- applied kinematics
- applied linguistics
- appliqué
- apply
