disastrous vs fatal

disastrous and fatal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
disastrous	No	Yes	No	No
fatal	No	Yes	No	No

As adjectives, disastrous and fatal are synonyms defined as:

disastrous and fatal: (of events) having extremely unfortunate or dire consequences; bringing ruin

Other synonyms of disastrous include black, calamitous, fateful.

disastrous (adjective)	fatal (adjective)
(of events) having extremely unfortunate or dire consequences; bringing ruin	bringing death
	having momentous consequences; of decisive importance
	controlled or decreed by fate; predetermined
	(of events) having extremely unfortunate or dire consequences; bringing ruin