fateful vs calamitous

fateful and calamitous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fateful	No	Yes	No	No
calamitous	No	Yes	No	No

As adjectives, fateful and calamitous are synonyms defined as:

fateful and calamitous: (of events) having extremely unfortunate or dire consequences; bringing ruin

Other synonyms of fateful include black, disastrous, fatal.

fateful (adjective)	calamitous (adjective)
having momentous consequences; of decisive importance	(of events) having extremely unfortunate or dire consequences; bringing ruin
controlled or decreed by fate; predetermined
ominously prophetic
(of events) having extremely unfortunate or dire consequences; bringing ruin