ruinous vs catastrophic

ruinous and catastrophic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ruinous	No	Yes	No	No
catastrophic	No	Yes	No	No

As adjectives, ruinous and catastrophic are synonyms defined as:

ruinous and catastrophic: extremely harmful; bringing physical or financial ruin

ruinous (adjective)	catastrophic (adjective)
causing injury or blight; especially affecting with sudden violence or plague or ruin	extremely harmful; bringing physical or financial ruin
extremely harmful; bringing physical or financial ruin