foretoken vs omen

foretoken and omen both are nouns.

Word	Noun	Adjective	Verb	Adverb
foretoken	Yes	No	No	No
omen	Yes	No	Yes	No

As nouns, omen is a hyponym of foretoken; that is, omen is a word with a more specific, narrower meaning than foretoken:

foretoken: an event that is experienced as indicating important things to come
omen: a sign of something about to happen

Other hyponyms of foretoken include war cloud, portent, presage, prodigy, prognostic, prognostication.

foretoken (noun)	omen (noun)
an event that is experienced as indicating important things to come	a sign of something about to happen

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