premonition vs shadow

premonition and shadow both are nouns.

Word	Noun	Adjective	Verb	Adverb
premonition	Yes	No	No	No
shadow	Yes	No	Yes	No

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

Other hyponyms of premonition include presage.

premonition (noun)	shadow (noun)
an early warning about a future event	refuge from danger or observation
a feeling of evil to come	something existing in perception only
	an indication that something has been present
	a premonition of something adverse
	an unilluminated area
	a spy employed to follow someone and report their movements
	an inseparable companion
	a dominating and pervasive presence
	shade within clear boundaries

premonition (verb)	shadow (verb)
	follow, usually without the person's knowledge
	make appear small by comparison
	cast a shadow over