stridulous

As an adjective stridulous is

emitting a particularly harsh or shrill sound.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective stridulous is

emitting a particularly harsh or shrill sound.

As adjectives the difference between stridulous and stertorous

is that stridulous is emitting a particularly harsh or shrill sound while stertorous is sounding like snoring or snorting.

As an adjective stridulous

is emitting a particularly harsh or shrill sound.

As a noun stridor is

a harsh, shrill, unpleasant noise.

As adjectives the difference between shrill and stridulous

is that shrill is high-pitched and piercing while stridulous is emitting a particularly harsh or shrill sound.

As a verb shrill

is to make a shrill noise.

As a noun shrill

is a shrill sound.

As adjectives the difference between harsh and stridulous

is that harsh is unpleasantly rough to the touch or other senses while stridulous is emitting a particularly harsh or shrill sound.

As a verb harsh

is (slang) to negatively criticize.