calamitous vs fateful

calamitous and fateful both are adjectives.

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

As adjectives, calamitous and fateful are synonyms defined as:

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

Other synonyms of calamitous include black, disastrous, fatal.

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