We don't have synonyms for knife-edges yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are knife-edge, knife edges and knife-edged.
(n) :
(figuratively) A precarious balance that could be upset by a very small force in either direction.
(n) :
A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam, or other piece required to oscillate with the least possible friction.
(n) :
Used other than figuratively or idiomatically: the edge of a knife.
(n) :
(figuratively) A precarious balance that could be upset by a very small force in either direction.
(n) :
A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam, or other piece required to oscillate with the least possible friction.
(n) :
Used other than figuratively or idiomatically: the edge of a knife.