Monstrous vs Terrifying - What's the difference?

Monstrous is a related term of terrifying.

is that monstrous is hideous or frightful while terrifying is frightening or intimidating.

(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

(en adjective)

Frightening or intimidating.

Of a formidable nature; terrific

* terrifyingly

(head)