- AAT... to Ablepsy...
- Ablutomania... to Abruption...
- Abscess... to Acanthrocytosis...
- Acapnia... to Accreta...
- Accretio... to Acheiria...
- Achillobursitis... to Acidocytosis...
- Acidopenia... to Acragnosis...
- Acrania... to Acropachy...
- Acropachyderma... to Actinoneuritis...
- Action... to Additional...
- Adduction... to Adenopharyngitis...
- Adenophlegmon... to Adrenal...
- Adrenalism... to Affection...
- Afibrinogenemia... to Agranulocytopenia...
- Agranulocytosis... to Airplane...
- Akathisia... to Alcohol...
- Alcoholism... to Allergy...
- Allescheriosis... to Alymphoplasia...
- Alzheimer... to Amnestic...
- Amniocentesis... to Anaerosis...
- Analbuminemia... to Android...
- Anectasis... to Angiohemophilia...
- Angioid... to Anguillulosis...
- Angulation... to Ankylurethria...
- Annular... to Anterior...
- Antero... to Anuria...
- Anus... to Aplasia...
- Apleuria... to Arachnitis...
- Arachnodactyly... to Argyria...
- Arhinencephaly... to Arteriolosclerosis...
- Arterionephrosclerosis... to Arthrophyte...
- Arthrophytis... to Ascorbic...
- ASCVD... to Asteroid...
- Asthenia... to Atelocardia...
- Atelomyelia... to Atrophoderma...
- Atrophy... to Autointoxication...
- Autophony... to Azygos...