sum-up vs sketch

sum-up and sketch both are nouns.

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

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

sum-up (noun)	sketch (noun)
a brief statement that presents the main points in a concise form	preliminary drawing for later elaboration
	short descriptive summary (of events)
	a humorous or satirical drawing published in a newspaper or magazine
	a brief literary description

sum-up (verb)	sketch (verb)
	describe roughly or briefly or give the main points or summary of
	make a sketch of