perspicacious

Critical is a synonym of perspicacious.

As adjectives the difference between critical and perspicacious

is that critical is inclined to find fault or criticize; fastidious; captious; censorious; exacting while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.

As a noun critical

is a critical value, factor, etc.

As adjectives the difference between pertinacious and perspicacious

is that pertinacious is holding tenaciously to an opinion or purpose while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.

As adjectives the difference between perspicacious and fatuous

is that perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

In obsolete terms the difference between sharp and perspicacious

is that sharp is fierce; ardent; fiery; violent; impetuous while perspicacious is able to physically see clearly; quick-sighted; sharp-sighted.

As adjectives the difference between sharp and perspicacious

is that sharp is able to cut easily while perspicacious is of acute discernment; having keen insight; mentally perceptive.

As an adverb sharp

is to a point or edge; piercingly; eagerly; sharply.

As a noun sharp

is the symbol ♯, placed after the name of a note in the key signature or before a note on the staff to indicate that the note is to be played a semitone higher.

As a verb sharp

is to raise the pitch of a note half a step making a natural note a sharp.

As a proper noun Sharp

is {{surname}.

As an adjective perspicacious

is (figuratively) of acute discernment; having keen insight; mentally perceptive.

As a noun observer is

one who makes observations, monitors or takes notice.

In obsolete|lang=en terms the difference between profound and perspicacious

is that profound is (obsolete) to dive deeply; to penetrate while perspicacious is (obsolete) able to physically see clearly; quick-sighted; sharp-sighted.

As adjectives the difference between profound and perspicacious

is that profound is descending far below the surface; opening or reaching to great depth; deep while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.

As a noun profound

is (obsolete) the deep; the sea; the ocean.

As a verb profound

is (obsolete) to cause to sink deeply; to cause to dive or penetrate far down.

Cunning is a related term of perspicacious.

In obsolete|lang=en terms the difference between cunning and perspicacious

is that cunning is (obsolete) knowledge; learning; special knowledge (sometimes implying occult or magical knowledge) while perspicacious is (obsolete) able to physically see clearly; quick-sighted; sharp-sighted.

As adjectives the difference between cunning and perspicacious

is that cunning is sly; crafty; clever in surreptitious behaviour while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.

As a noun cunning

is (obsolete) knowledge; learning; special knowledge (sometimes implying occult or magical knowledge).

As adjectives the difference between perspicacious and circumspect

is that perspicacious is of acute discernment; having keen insight; mentally perceptive while circumspect is carefully aware of all circumstances; considerate of all that is pertinent.

Careful is a related term of perspicacious.

As adjectives the difference between careful and perspicacious

is that careful is (obsolete) full of care or grief; sorrowful, sad while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.

Quickwitted is a related term of perspicacious.

As adjectives the difference between quickwitted and perspicacious

is that quickwitted is while perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.