- aluminium bronze
- amalgam
- annunciate
- air mass
- apetalous
- apostasy
- animal oil
- agree
- acidify
- air passage
- ambler
- adoptee
- anesthetist
- attention
- aid
- advancing
- access
- access path
- anteroom
- assist
- advance
- afoul
- anchor
- arduous
- airflow
- accent
- amplitude
- approval
- ass
- anus
- atavism
- airspace
- acidophilic
- animal virus
- atrabilious
- annoyer
- anger
- alopecia
- alluvial soil
- amalgamator
- abeyance
- affidavit
- auspicate
- assignee
- amenorrhoea
- apnea
- appose
- apprenticeship
- artificial joint
- animal glue