Severe
Severe, drastic, dreadful, awful, bad, profound, pressing, all-important, dangerous, perilous, life-threatening, parlous, critical, dire, terrible, grave, serious, urgent, desperate, vital, hazardous, precarious, life-and-death, and egregious.
Stabbing
Stabbing, penetrating, sharp, racking, burning, fierce, intense, extreme, agonizing, hellish, tormenting, insufferable, more than one can bear, short-lasting, short and sharp, shooting, piercing, keen, searing, consuming, ferocious, severe, excruciating, grievous, torturous, unbearable, unendurable, exquisite, and peracute.
Astute
Astute, sharp, razor-sharp, quick, agile, ingenious, intelligent, brilliant, canny, discerning, perspicacious, insightful, piercing, sagacious, judicious, quick off the mark, brainy, savvy, pawky, whip-smart, argute, shrewd, sharp-witted, rapier-like, quick-witted, nimble, clever, bright, smart, intuitive, perceptive, penetrating, incisive, discriminating, wise, on the ball, quick on the uptake, streetwise, suss, heads-up, long-headed, and sapient.
Keen
Example Sentences of Acute
The acute angle is smaller than a right angle.
Her acute sense of hearing helped detect danger.
The acute phase of the disease is critical.
The detective had an acute mind for details.
The patient’s condition is acute but stable.
He felt acute pain in his leg.
She showed acute awareness of the situation.
He experienced acute stress before the exam.