Monstrous vs Grievous - What's the difference?

Monstrous is a related term of grievous.

is that monstrous is hideous or frightful while grievous is causing grief, pain or sorrow.

(en adjective)

hideous or frightful

* Shakespeare

So bad a death argues a monstrous life.

enormously large

a monstrous height

a monstrous ox

freakish or grotesque

* John Locke

a monstrous birth

* Jeremy Taylor

He, therefore, that refuses to do good to them whom he is bound to love is unnatural and monstrous in his affections.

of, or relating to a mythical monster; full of monsters

* Milton

Where thou, perhaps, under the whelming tide / Visitest the bottom of the monstrous world.

(obsolete) marvellous; strange

* See also

* greuous (obsolete) * grievious (less common outside dialects)

(en adjective)

Causing grief, pain or sorrow.

* 1883 ,

As for the captain, his wounds were grievous indeed but not dangerous.

Serious, grave, dire or dangerous.

* See also