sketch vs sketcher

sketch and sketcher both are nouns.

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

sketch (noun)	sketcher (noun)
preliminary drawing for later elaboration	an implement for sketching
short descriptive summary (of events)	someone who draws sketches
a humorous or satirical drawing published in a newspaper or magazine
a brief literary description

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