sharp-cornered

jagged

V-shaped Y-shaped akimbo crooked crotched divaricate forked oblique skewed zigzag

straight

acicular aciculate aciculated acuminate acuminous acute barbed cornered cuspate cuspated cuspidate cuspidated edged fine keen peaked piked pointy pronged sharp spiked

barbed sharp

acuminate cornered edged fine keen peaked spiked

acicular aciculate acuminous acute arrowlike cuspidate mucronate piked pointy pronged sagittal sagittate

blunt dull

acicular aciculate aciculated acuminate acuminous acute barbed cornered cuspate cuspated cuspidate cuspidated edged fine keen mucronate peaked piked pronged sharp spiked