sum-up vs outline

sum-up and outline both are nouns.

Word	Noun	Adjective	Verb	Adverb
sum-up	Yes	No	No	No
outline	Yes	No	Yes	No

As nouns, outline is a hyponym of sum-up; that is, outline is a word with a more specific, narrower meaning than sum-up:

sum-up (noun)	outline (noun)
a brief statement that presents the main points in a concise form	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

sum-up (verb)	outline (verb)
	describe roughly or briefly or give the main points or summary of
	trace the shape of
	draw up an outline or sketch for something