| Aspalathus horizontalis | Aspalathus leucophylla | Aspalathus linearis |
| Aspalathus serpens | Aspalathus truncata | Asparagaceae |
| Asparagales | Asparaginase | Asparagine |
| Asparagus (genus) | Asparagus aethiopicus | Asparagus densiflorus |
| Asparagus officinalis | Asparagus setaceus | Aspartame |
| Aspartate carbamoyltransferase | Aspartate transaminase | Aspartic acid |
| Asparukh of Bulgaria | Aspasia | Aspatha |
| Aspatha gularis | Aspect ratio (aerodynamics) | Aspect ratio (image) |
| Aspect-oriented programming | Aspen Movie Map | Aspen, Colorado |
| Asperagaceae | Asperger syndrome | Aspergillosis |
| Aspergillus | Aspergillus flavus var. oryzae | Aspergillus fumigatus |
| Aspergillus nidulans | Aspergillus niger | Asperula |
| Asperula arvensis | Asperula cynanchica | Asperula orientalis |
| Asperula setosa | Asperula stricta | AsPh3 |
| Asphalt 7: Heat | Asphalt plant | Asphodelaceae |
| Asphodeline | Asphodeline anatolica | Asphodeline baytopiae |
| Asphodeline brevicaulis | Asphodeline cilicica | Asphodeline damascena |
| Asphodeline globifera | Asphodeline liburnica | Asphodeline lutea |
| Asphodeline prismatocarpa | Asphodeline prolifera | Asphodeline recurva |
| Asphodeline rigidifolia | Asphodeline taurica | Asphodeline tenuior |
| Asphodeline turcica | Asphodelus | Asphodelus acaulis |
| Asphodelus aestivus | Asphodelus albus | Asphodelus bento-rainhae |
| Asphodelus cerasiferus | Asphodelus fistulosus | Asphodelus gracilis |
| Asphodelus lusitanicus | Asphodelus macrocarpus | Asphodelus ramosus |
| Asphodelus refractus | Asphodelus roseus | Asphodelus serotinus |
| Asphodelus tenuifolius | Asphodelus viscidulus | Asphyxia |
| Aspidistra | Aspidistra alata | Aspidistra atroviolacea |
| Aspidistra bicolor | Aspidistra caespitosa | Aspidistra campanulata |
| Aspidistra carinata | Aspidistra cryptantha | Aspidistra dodecandra |
| Aspidistra elatior | Aspidistra fimbriata | Aspidistra flaviflora |
| Aspidistra fungilliformis | Aspidistra grandiflora | Aspidistra insularis |
| Aspidistra linearifolia | Aspidistra lutea | Aspidistra minutiflora |
| Aspidistra muricata | Aspidistra nikolaii | Aspidistra oblongifolia |
| Aspidistra papillata | Aspidistra recondita | Aspidistra retusa |
| Aspidistra saxicola | Aspidistra sichuanensis | Aspidistra subrotata |
| Aspidistra superba | Aspidistra tonkinensis | Aspidistra triloba |
| Aspidistra tubiflora | Aspidistra umbrosa | Aspidistra urceolata |
| Aspidophytine | Aspila subflexa | Aspinwall, Iowa |
| Aspirated consonant | Aspirator (medical device) | Aspirator (pump) |
| Aspire Tower | Aspire zone | Aspirin |
| Aspirin-induced asthma | Aspleniaceae | Asplenium |
| Asplenium adiantum-nigrum | Asplenium australasicum | Asplenium marinum |
| Asplenium nidus | Asplenium ruta-muraria | Asplenium scolopendrium |
| Asplenium trichomanes | Aspremont, Alpes-Maritimes | ASRAAM |
| Asri Zainul Abidin | Asror Aliqulov | |
| | |
| Assa-Zag Province | Assaad Bouab |
| Assab | Assad Kotaite | Assadi |
| Assads, Morocco | Assaisse | Assaki |
| Assam tea | Assamese alphabet | Assani Bajope |
| Assani Lukimya-Mulongoti | Assaria, Kansas | Assassin's Creed |
| Assassin's Creed (video game) | Assassin's Creed Brotherhood | Assassin's Creed II |
| Assassin's Creed II: Discovery | Assassin's Creed III | Assassin's Creed III: Liberation |
| Assassin's Creed IV: Black Flag | Assassin's Creed Rogue | Assassin's Creed Unity |
| Assassin's Creed: Altaïr's Chronicles | Assassin's Creed: Bloodlines | Assassin's Creed: Brotherhood |
| Assassin's Creed: Lineage | Assassin's Creed: Revelations | Assassination |
| Assassination (1987 film) | Assassination attempts on Adolf Hitler | Assassination classroom |
| Assassination of Abraham Lincoln | Assassination of Anwar Sadat | Assassination of Archduke Franz Ferdinand of Austria |
| Assassination of Benazir Bhutto | Assassination of John F. Kennedy | Assassination of Rafic Hariri |
| Assassins (film) | Assassins Creed | Assassins Creed the brotherhood |
| Assata Shakur | Assault rifle | AssaultCube |
| Assef Shawkat | Asselian | Asselin de Cherville |
| Assem Qanso | Assemblage (art) | Assembly |
| Assembly (CLI) | Assembly language | Assembly line |
| Assembly of Experts | Assemblywomen | Asset allocation |
| Asset management | Asset-backed security | Asset-based community development |
| Assia Djebar | Assif El Mal | Assignment (law) |
| Assimilation (biology) | Assiminea mesopotamica | Assimiou Touré |
| Assist | Assistant referee (association football) | Assisted GPS |
| Assisted reproductive technology | Assisted suicide | Assiut Airport |
| Associação de Escoteiros de Macau | Associação dos Escuteiros de Cabo Verde | Associate professor |
| Associated British Foods | Associated petroleum gas | Associated Press |
| Association (psychology) | Association des Guides et Scouts de Monaco | Association des Scouts de Djibouti |
| Association des Scouts et Guides de Mauritanie | Association football | Association for Business Communication |
| Association for Computers and the Humanities | Association for Computing Machinery | Association management |
| Association management company | Association of African Universities | Association of American Universities |
| Association of Commonwealth Universities | Association of European Airlines | Association of Muslim Scholars |
| Association of Southeast Asian Nations | Association of Tennis Professionals | Association sportive Charréard-Vénissieux |
| Associazione Guide Esploratori Cattolici Sammarinesi | Assonet, Massachusetts | Assortative mating |
| Assortative mixing | Assumed Incumbency | Assumption Parish, Louisiana |
| Assumption, Illinois | Asswiller | Assyria |
| Assyria Township, Michigan | Assyrian Genocide | Assyrian genocide |
| Assyrian people | Assyrian Siege of Jerusalem | Assyriology |
| Assyriska Föreningen | AST | Astacoidea |
| Astacus astacus | Astana | Astana International Airport |
| Astaneh, Anbarabad | Astaneh, Ardestan | Astaneh-ye Ashrafiyeh County |
| Astarte | Astatine | Astatotilapia desfontainii |
| Astérix (satellite) | Astemizole | Aster |
| Aster albanicus | Aster albescens | Aster alpinus |
| Aster scaber | Aster tataricus | Aster tongolensis |
| Asteraceae | Asterales | Asteranae |
| Astereae | Asterias forbesi | Asteridae |
| Asterids | Asterinae | Asterism (astronomy) |
| Asterix | Asterix and Cleopatra (film) | Asteroid |
| Asteroid impact avoidance | Asteroidea | Asteroideae |
| Asterope (star) | Asterotheca | Asthma |
| Asthmagen | Astigmata | Astigmatism |
| Astigmatism (eye) | Astley Cooper | ASTM |
| ASTM International | Aston Martin | Aston Villa F.C. |
| Aston-Jonction, Quebec | Astoria, South Dakota | ASTRA (reactor) |
