Synonyms of the word

perspicaciousness

• n. Perspicacity.

astuteness

• n. The quality of being astute.

intelligence

• n. (uncountable) Capacity of mind, especially to understand principles, truths, facts or meanings, acquire…
• n. (countable) An entity that has such capacities.
• n. (uncountable) Information, usually secret, about the enemy or about hostile activities.
• n. (countable) A political or military department, agency or unit designed to gather information, usually…
• n. (dated) Acquaintance; intercourse; familiarity.

perspicacity

• n. Acute discernment or understanding; insight.
• n. The human faculty or power to mentally grasp or understand clearly.
• n. (obsolete) Keen eyesight.

shrewdness

• n. The quality of being shrewd.
• n. An invented collective name for a group of apes.