Synonyms for Knifelike:

adj.

knifelike (adjective)
lancinating, stabbing, acute, piercing, shooting, keen, Gnawing.
piercing (adjective)
penetrating, sharp.
sharp (adjective)
cutting, sharp, stabbing, distinct, lancinating.

n.

big, Gnawing, shooting. knifelike (noun)
incisive, discriminating, acute, lancinating, cutting, penetrative, penetrating, keen, perceptive, sharp, stabbing, piercing, lancinate, distinct.

Other synonyms:

Gnawing. shooting. Other relevant words:
acute, Gnawing, shooting.