foreshadow vs portend

foreshadow and portend both are verbs.

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

As verbs, foreshadow and portend are synonyms defined as:

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

foreshadow (verb)	portend (verb)
indicate, as with a sign or an omen	indicate, as with a sign or an omen