- Apela Luss
- Apella
- Apep
- Apep (planet)
- Aperception quotient
- Aperokei
- Apex Chair
- Apexin Messesh
- Aphasia
- Aphir'keth
- Aphrodite
- Aphrodite Terraforming Station
- Aplithin
- Apnex
- Apnex Sea
- Apnil
- Apnira
- Apocalypse Rising
- Apollo
- Apollo (NCC-1834/4)
- Apollo (disambiguation)
- Apollo 1
- Apollo 11
- Apollo 11 400th anniversary
- Apollo Day
- Apollo Theater
- Apollo Tricentennial
- Apollo class
- Apollo program
- Apollonia
- Apotheosis of Ramn
- Appalachia class
- Appaloosa
- Appel (disambiguation)
- Appius Cornelius
- Apple
- Apple cobbler
- Apple danish
- Apple pie
- Apple soup
- Applied Science Directorate
- Apricot
- April
- April (disambiguation)
- April (shuttlecraft)
- April Beach
- April Hebert
- Aprilia
- Aprilia III
- Apryl Burch
- Apsac
- Apus
- Apus constellation
- Apyra
- Aqaba
- Aqalova Lorexen
- Aqualantern
- Aquan
- Aquarium
- Aquarius
- Aquarius Formation
- Aquarius class
- Aquarius constellation
- Aquashuttle
- Aquiel
- Aquiel Uhnari
- Aquila
- Aquila (Centurion)
- Aquila I
- Aquila II
- Aquila III
- Aquila IV
- Aquila Scorpi
- Aquila constellation
- Aquila system
- Aquino (disambiguation)
- Ar'Kala class
- Ar'Kif class
- Ar'hael Desert
- Ar Bintor
- Ar Daraan
- Ara
- AraKahr
- AraKahr (disambiguation)
- Arabia
- Arabian Nights
- Arachnae
- Arachnae system
- Arachnian
- Arachnid
- Arachnid (species)
- Arachnid Nebula
- Arada
- Araev zh'Rhun
- Arafel County
- Arafel Pagro
- Aragos
- Arai
- Arak
- Arak'Taral
- Arak III
- Arak Katal
- Arakan-ikaran
- Arakis
- Arakis Prime
- Aralak Ocean
- Aralan
- Aralas
- Araldii
- Arali
- Arali Prime
- Aralsee II
- Aram Korel
- Aramanth
- Aramax
- Aramis
- Aramut
- Aran
- Aran'tsah
- Arandis
- Arandra Entry
- Arani
- Aranthanien ch'Revash
- Arara
- Aratenik
- Arati Mhevet
- Aratril
- Arava
- Aravesh ch'Vrane
- Arawak Colony
- Arawath
- Arawath (planet)
- Arawath colony
- Arawath sector
- Araxa
- Arb'sa
- Arbaza
- Arbazan
- Arbazan system
- Arbazan vulture
- Arbee
- Arbiter
- Arbiter (disambiguation)
- Arbiter class
- Arbiter class (battlecruiser)
- Arbiter of Succession
- Arbiter of the Vulcan Mineral Syndicate
- Arboretum
- Arbosa-Lo
- Arbuk
- Arbutus
- Arbutus VIII
- Arc de Triomphe
- Arc launcher
- Arc welder
- Arcade
- Arcadia
- Arcadia (CE-1)
- Arcadia (disambiguation)
- Arcadian
- Arcalion
- Arcan-Beta
- Arcanian
- Arcanis Majoris
- Arcee
- Arch-Merchant
- Arch Fuller
- Archaeology
- Archaeology and anthropology officer
- Archangel
- Archanis
- Archanis IV
- Archanis IV research outpost
- Archanis sector
- Archaria
- Archaria III
- Archarian
- Archass
- Archenida
- Archer
- Archer's Planet
- Archer's Rebellion
- Archer (Admiral)
- Archer (CVL-1)
- Archer (city)
- Archer (shuttlecraft)
- Archer Auditorium
- Archer Hall
- Archer IV
- Archer IX
- Archer Ribbon for Conspicuous Bravery
- Archer Spacedock
- Archer University Hospital
- Archer class
- Archerian slug wine
- Archernar
- Archernar IV
- Archernar IV contact station
- Archernarian
- Archibald
- Archibald Dumont
- Archibald II
- Archimedes
- Archimedes (Enterprise-E)
- Archimedes (da Vinci)
- Archimedes class
- Archimedes sector
- Architectrix
- Architects
- Architects of Infinity
- Archivists
- Archnos
- Archon
- Archon (disambiguation)
- Archon class
- Archpriest
- Archquester
- Arcology
- Arctic Circle
- Arctic world
- Arcturan musk oil
- Arcturian
- Arcturian fizz
- Arcturian wood
- Arcturian yoga
- Arcturus
- Arcturus (disambiguation)
- Arcturus 1
- Arcturus IV
- Arcturus VII
- Arctus Baran
- Arcybite
- Ardack Sprachnee
- Ardaji
- Ardak-4
- Ardak 1000
- Ardak Kumerian
- Ardaka
- Ardam
- Ardan
- Ardan IV
- Ardana
- Ardana (mirror)
- Ardana Station
- Ardana aspic
- Ardanan
- Ardanan parasite
- Ardanans
- Ardea Preax
- Ardelon Tandro
- Arden
- Arden (disambiguation)
- Ardent
- Ardent (free starship)
- Ardon Broht
- Ardra
- Ardra (myth)
- Ardra (person)
- Ardrosam-G
- Arduria
- Ardwanian
- Ardwanian sweet nectar
- Are Unheard Melodies Sweet?
- Area 51
- Arecibo
- Areel Shaw
- Areen
- Arehaz
- Arehaz system
- Areian freighter
- Areinnye
- Arell Mrith
- Arena
- Arena of Life
- Arena of Sompek
- Arenn
- Arenthialeh zh'Vazdi
- Areolan
- Ares
- Ares City
- Ares I
- Ares III
- Ares IV
- Ares V
- Aresai
- Aresha Drexa
- Areshta Drexa
- Areta
- Areth
- Aretha iXJohns
- Aretian
- Aretian system
- Arex Na Eth
- Arg's Tongo Parlor and Holosuite Emporium
- Argainin soup
- Argala
- Argala system
- Argan
- Argan, son of T'lak
- Argashek
- Argashek (mirror)
- Argaya
- Argelian
- Argelian (Romulan)
- Argelian delight
- Argelian mocha sorbet
- Argelian nine-layer cocktail
- Argelian spaceport city
- Argelian sweet bun
- Argelian tree snake
- Argelius II
- Argelius sector
- Argendi sandwich
- Argentina
- Argentomea
- Argenziano
- Argez
- Argil of G'lyndr
- Argive
- Argo
- Argo (buggy)
- Argo (planet)
- Argo (shuttlecraft)
- Argolis Cluster
- Argon
- Argon (disambiguation)
- Argon (element)
- Argon class
- Argona
- Argona II
- Argonne Paris
- Argontron
- Argos (disambiguation)
- Argos IV
- Argosian
- Argosian sector
- Argosy
- Argramine soup
- Argratha
- Argrathi
- Argunov
- Argus
- Argus (High Captain)
- Argus (disambiguation)
- Argus Array