- apace
- Apache
- apache dance
- apache devil dance
- apadana
- Apalachicola
- Apalachicola River
- Apalachicola rosemary
- apanage
- apar
- apart
- apartheid
- apartment
- apartment building
- apartment house
- apatetic coloration
- apathetic
- apathetically
- apathy
- apatite
- apatosaur
- apatosaurus
- Apatosaurus excelsus
- Apatura
- Apatura iris
- APC
- ape
- ape-man
- Apeldoorn
- apelike
- Apennines
- aper
- apercu
- aperea
- aperient
- aperiodic
- aperitif
- aperture
- apery
- apetalous
- apetalous flower
- apex
- apex of the suns way
- Apgar score
- aphaeresis
- aphaeretic
- aphagia
- aphakia
- aphakic
- aphanite
- aphanitic
- aphasia
- aphasic
- Aphasmidia
- aphelion
- apheresis
- apheretic
- aphesis
- aphetic
- aphid
- aphid lion
- Aphididae
- Aphidoidea
- Aphis
- Aphis fabae
- aphis lion
- Aphis pomi
- aphonia
- aphonic
- aphorise
- aphorism
- aphorist
- aphoristic
- aphorize
- aphotic
- Aphriza
- Aphriza virgata
- aphrodisia
- aphrodisiac
- aphrodisiacal
- Aphrodite
- Aphrophora
- Aphrophora saratogensis
- aphthous ulcer
- Aphyllanthaceae
- Aphyllanthes
- Aphyllophorales
- aphyllous
- Apia
- Apiaceae
- apian
- apiarian
- apiarist
- apiary
- apical
- apical placentation
- apiculate
- apicultural
- apiculture
- apiculturist
- Apidae
- apiece
- Apios
- Apios americana
- Apios tuberosa
- Apis
- Apis mellifera
- Apis mellifera adansonii
- Apis mellifera scutellata
- apish
- apishamore
- Apium
- Apium graveolens
- Apium graveolens dulce
- Apium graveolens rapaceum
- apivorous
- aplacental
- Aplacophora
- aplacophoran
- aplanatic
- aplasia
- aplastic anaemia
- aplastic anemia
- Aplectrum
- Aplectrum hyemale
- aplite
- aplitic
- Aplodontia
- Aplodontia rufa
- Aplodontiidae
- aplomb
- Aplysia
- Aplysia punctata
- Aplysiidae
- apnea
- apneic
- apnoeic
- apoapsis
- apocalypse
- apocalyptic
- apocalyptical
- apocarpous
- apochromatic
- apocope
- apocrine
- apocrine gland
- Apocrypha
- apocryphal
- Apocynaceae
- apocynaceous
- Apocynum
- Apocynum androsaemifolium
- Apocynum cannabinum
- Apocynum pumilum
- apodal
- apodeictic
- apodeme
- Apodemus
- Apodemus sylvaticus
- apodictic
- Apodidae
- apodiform bird
- Apodiformes
- apodous
- apoenzyme
- apogametic
- apogamic
- apogamous
- apogamy
- apogean
- apogee
- Apogon
- Apogon maculatus
- Apogonidae
- Apoidea
- apojove
- apolemia
- apolitical
- Apollinaire
- Apollo
- Apollo asteroid
- Apollo program
- apologetic
- apologetically
- apologetics
- apologia
- apologise
- apologist
- apologize
- apologue
- apology
- apolune
- apomict
- apomictic
- apomictical
- apomixis
- apomorphine
- aponeurosis
- aponeurotic
- apopemptic
- apophasis
- apophatic
- apophatism
- apophthegm
- apophyseal
- apophysis
- apoplectic
- apoplectiform
- apoplectoid
- apoplexy
- apoptosis
- Aporocactus
- Aporocactus flagelliformis
- aposelene
- aposematic coloration
- aposiopesis
- aposiopetic
- apostasy
- apostate
- apostatise
- apostatize
- Apostelic Father
- apostle
- Apostle of Germany
- Apostle of the Gentiles
- Apostle Paul
- apostleship
- apostolic
- apostolic delegate
- apostolical
- apostrophe
- apostrophic
- apostrophise
- apostrophize
- apothecaries ounce
- apothecaries pound
- apothecaries unit
- apothecaries weight
- apothecary
- apothecarys shop
- apothecial
- apothecium
- apothegm
- apothegmatic
- apothegmatical
- apotheose
- apotheosis
- apotheosise
- apotheosize
- apotropaic
- appal
- Appalachia
- Appalachian
- Appalachian Mountains
- Appalachians
- appall
- appalled
- appalling
- appallingly
- Appaloosa
- appanage
- apparatchik
- apparatus
- apparatus urogenitalis
- apparel
- apparel chain
- apparel industry
- appareled
- apparency
- apparent
- apparent horizon
- apparent motion
- apparent movement
- apparently
- apparentness
- apparition
- apparitional
- appeal
- appeal board
- appealable
- appealing
- appealingly
- appealingness
- appeals board
- appeals court
- appear
- appearance
- appearing
- appeasable
- appease
- appeasement
- appeaser
- appeasing
- appellant
- appellate
- appellate court
- appellation
- appellative
- append
- appendage
- appendaged
- appendant
- appendectomy
- appendicectomy
- appendicitis
- appendicle
- appendicular
- appendicular artery
- appendicular skeleton
- appendicular vein
- appendicularia
- appendix
- Appenzeller
- apperceive
- apperception
- apperceptive
- appertain
- appetence
- appetency
- appetent
- appetiser
- appetising
- appetisingness
- appetite
- appetite suppressant
- appetitive
- appetizer
- appetizing
- appetizingness
- Appian Way
- applaud
- applaudable
- applauder
- applause
- apple
- apple aphid
- apple blight
- apple butter
- apple canker
- apple dumpling
- apple fritter
- apple geranium
- apple jelly
- apple juice
- apple maggot
- apple mint
- apple nut
- apple of discord
- apple of Peru
- apple orchard
- apple pie
- apple polisher
- apple rust
- apple sauce
- apple tart
- apple tree
- apple turnover
- apple-scented
- apple-shaped
- apple-sized
- applecart
- applejack
- applemint
- applesauce
- applesauce cake
- applet
- Appleton
- Appleton layer
- applewood
- appliance
- applicability
- applicable
- applicant
- application
- application form
- application program
- application-oriented language
- applications programme
- applicative
- applicator
- applicatory
- applied
- applied anatomy
- applied math
- applied mathematics
- applied psychology
- applied science
- applied scientist
- applier
- applique
- apply
- appoggiatura
- appoint
- appointed
- appointee
- appointive
- appointment
- appointment book
- appointment calendar
- apportion
- apportionable
- apportioned
- apportioning
- apportionment
- apposable
- appose
- apposite
- appositeness
- apposition
- appositional
- appositive
- appositively
- appraisal
- appraise
- appraiser
- appraising
- appreciable
- appreciably
- appreciate
- appreciated
- appreciation
- appreciative
- appreciatively
- appreciativeness
- appreciator
- apprehend
- apprehended
- apprehender
- apprehensible
- apprehension
- apprehensive
- apprehensively
- apprehensiveness
- apprentice
- apprenticed
- apprenticeship
- appressed
- apprisal
- apprise
- apprize
- appro
- approach
- approach path
- approach pattern
- approach shot
- approach trench
- approachability
- approachable
- approaching
- approbate
- approbation
- approbative
- approbatory
- appropriable
- appropriate
- appropriately
- appropriateness
- appropriation
- appropriation bill
- appropriative
- appropriator
- approval
- approve
- approved
- approver
- approving
- approvingly
- approximate
- approximate range
- approximately
- approximation
- approximative
- appurtenance
- appurtenant
- Apr
- apractic
- apraxia
- apraxic
- Apresoline
- apricot
- apricot bar
- apricot sauce
- apricot tree
- April
- April 14
- April fool
- April Fools
- April Fools day
- apron
- apron string
- apropos
- apse
- apsidal
- apsis
- Apsu
- apt
- Aptenodytes
- Aptenodytes forsteri
- Aptenodytes patagonica
- apteral
- apterous
- Apterygidae
- Apterygiformes
- apteryx
- aptitude
- aptitudinal
- aptly
- aptness
- Apulia
- Apus
- Apus apus
- apyretic tetanus