- Astute implies shrewdness combined with sagacity and sometimes connotes, in addition, artfulness or cunning an astute politician See also syn. study at clever.
- Perspicacious suggests the penetrating mental vision or discernment that enables one clearly to see and understand what is obscure, hidden, etc. a perspicacious judge of character
- Sagacious implies keen discernment and farsighted judgment a sagacious counselor
- Shrewd implies keenness of mind, sharp insight, and a cleverness in practical matters a shrewd comment, businessman, etc.