- Shrewd suggests cleverness and acumen accompanied by practicality a shrewd judge of character, sometimes verging on craftiness a shrewd politician See also syn. study at intelligent.
- Ingenious stresses inventive skill, as in origination or fabrication an ingenious device
- Cunning suggests great skill or ingenuity, but often implies deception or craftiness cunning as a fox
- Clever , implies quick-wittedness or adroitness, as in contriving the solution to a problem a clever reply