| accessory(material, instrument, machine, tool, mechanism) |
| accordant |
| achievable(reasonable, likely, possible, desirable, feasible) |
| ad-lib(free, casual, impulsive, spontaneous, unprepared) |
| ad hoc measure(expression, idiom) |
| ad lib(expression, free, informal, casual, unrehearsed) |
| adaptable(suitable, opportune) |
| agent(noun, material, supply, tool, replacement) |
| agree |
| aid(noun, power, measure, process, way) |
| all-important(adjective, significant, essential, basic, vital) |
| all-purpose(adjective, utilizable) |
| all the rage(expression, idiom, new, hot, suitable) |
| alternate(supply, agent, substitute, replacement, alternative) |
| apparatus(material, means, instrument, machine, tool) |
| appliance(noun, support, material, property, store) |
| applied(adjective, utilizable) |
| approach(noun, move, plan, system, course) |
| appurtenant(adjective, appropriate) |
| arrangement(material, course, instrument, machine, tool) |