Synonyms for Razor-edged:

adj.

sharp (adjective)
prickly, thorny, needle-like, spiked, pointed, spinous, needle-point, keen, spear-like, jagged, sharp, sagittal, acute, bristly, spiny, barbed, Thistly, cutting, spiky, pointy.

n.

double-edged, dull, left-handed, serrated, razor-sharp, Two-edged.

Other synonyms:

serrated. left-handed, double-edged, Two-edged. razor-sharp. dull.