- atmometer
- algometer
- altazimuth
- actinometer
- arresting
- airplane ticket
- any tail_like structure
- a long tail
- a stooge
- adhesive plaster
- alexander pope
- acoustic delay line
- alexander archipelago
- alexander isayevich solzhenitsyn
- alexander hamilton
- alexander fleming
- articulatio cubiti
- articulatio genus
- adhesive excipient
- adhesive substance
- anas acuta
- affixial
- an assault
- attachable
- a stamp
- all_day sucker
- actor's line
- Arapahoe
- Arapaho
- atactic abasia
- ataraxis
- attachable goniometer
- arrogate to
- annex memory
- annexal
- addition and subtraction
- addition recorder
- addition reaction
- appendicectomy
- as a matter of joke
- a wash
- a goldsmith's wife
- an outcry or entreaty for help
- arouet
- adequate to
- as of no avail
- acerate leaf
- any sharp and pointed instrument
- a spear prong
- anchoritic