block out vs outline

block out is not a noun while outline is a noun.

Word	Noun	Adjective	Verb	Adverb
block out	No	No	Yes	No
outline	Yes	No	Yes	No

As verbs, outline is a hypernym of block out; that is, outline is a word with a broader meaning than block out:

Other hypernyms of block out include adumbrate, sketch.

block out (noun)	outline (noun)
	a schematic or preliminary plan
	a sketchy summary of the main points of an argument or theory
	the line that appears to bound an object

block out (verb)	outline (verb)
plan where and when songs should be inserted into a theatrical production, or plan a theatrical production in general	describe roughly or briefly or give the main points or summary of
indicate roughly	trace the shape of
shield from light	draw up an outline or sketch for something
prevent from entering