foreboding vs apprehension

foreboding and apprehension both are nouns.

Word	Noun	Adjective	Verb	Adverb
foreboding	Yes	Yes	No	No
apprehension	Yes	No	No	No

As nouns, apprehension is a hypernym of foreboding; that is, apprehension is a word with a broader meaning than foreboding:

Other hypernyms of foreboding include apprehensiveness, dread.

foreboding (noun)	apprehension (noun)
an unfavorable omen	the act of apprehending (especially apprehending a criminal)
a feeling of evil to come	the cognitive condition of someone who understands
	painful expectation
	fearful expectation or anticipation

foreboding (adjective)	apprehension (adjective)
ominously prophetic