- practical, practicable
- A simple method of learning to distinguish the meanings of these words is to turn to the entry impractical and reverse the meanings of the terms involved. When applied to persons, practical means "realistic," "sensible," "efficient"; as relating to acts or processes, practical means "workable," "manageable." Practicable means "capable of being used," "feasible," "possible." "Jim is a man with practical views about business." "What we need is a practical way to solve this problem." "Your idea is clever but hardly practicable." "There is no practicable method of keeping boys and girls away from each other." Basically, what is practicable can be done; what is practical can be done sensibly or usefully. An act can be both practical and practicable: It is practical to check the pressure in one's tires before starting on a trip (it's sensible to do so); it's also practicable to check the pressure (it's possible to do so).
Dictionary of problem words and expressions. Harry Shaw. 1975.