sketchy vs sketch

sketchy is not a noun while sketch is a noun.

Word	Noun	Adjective	Verb	Adverb
sketchy	No	Yes	No	No
sketch	Yes	No	Yes	No

sketchy (noun)	sketch (noun)
	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

sketchy (adjective)	sketch (adjective)
giving only major points; lacking completeness

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