- adversely disposed
- adversity flatters no man
- atenolol
- acebutolol
- ascendence
- Acinonyx
- Alopex
- Antilocapra
- Archidiskidon
- Aplodontia
- Aotus
- Algeripithecus
- Atherurus
- Alouatta
- Antrozous
- Arvicola
- Apodemus
- Adenota
- Alcelaphus
- Acrobates
- Antilope
- Ailuropoda
- Arctocebus
- Antidorcas
- Arctictis
- Ailurus
- Arctonyx
- Aepyceros
- Abrocoma
- Ateles
- Arctocephalus
- Ammotragus
- Alces
- ana
- Aztec
- alismales
- apparently
- anathema
- alienator
- aggravator
- arriviste
- artlessness
- au naturel
- amaryllis belladonna
- anonym
- agnomen
- assumed name
- alias
- anonymity
- astor