outlook vs apprehension

outlook and apprehension both are nouns.

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

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

Other hyponyms of outlook include hope, promise, foretaste, possibility, anticipation, expectancy, misgiving.

outlook (noun)	apprehension (noun)
the act of looking out	the act of apprehending (especially apprehending a criminal)
belief about (or mental picture of) the future	the cognitive condition of someone who understands
a habitual or characteristic mental attitude that determines how you will interpret and respond to situations	painful expectation
	fearful expectation or anticipation