fateful vs portentous

fateful and portentous both are adjectives.

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

As adjectives, fateful and portentous are synonyms defined as:

Other synonyms of fateful include foreboding.

fateful (adjective)	portentous (adjective)
having momentous consequences; of decisive importance	puffed up with vanity
controlled or decreed by fate; predetermined	ominously prophetic
ominously prophetic	of momentous or ominous significance
(of events) having extremely unfortunate or dire consequences; bringing ruin