foretell vs portend

foretell and portend both are verbs.

Word	Noun	Adjective	Verb	Adverb
foretell	No	No	Yes	No
portend	No	No	Yes	No

As verbs, foretell and portend are synonyms defined as:

Other synonyms of foretell include augur, auspicate, betoken, bode, forecast, foreshadow, omen, predict, prefigure, presage, prognosticate.

foretell (verb)	portend (verb)
make a prediction about; tell in advance	indicate, as with a sign or an omen
indicate, as with a sign or an omen
foreshadow or presage