limn vs outline

limn is not a noun while outline is a noun.

Word	Noun	Adjective	Verb	Adverb
limn	No	No	Yes	No
outline	Yes	No	Yes	No

As verbs, limn and outline are synonyms defined as:

Other synonyms of limn include delineate.

limn (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

limn (verb)	outline (verb)
make a portrait of	describe roughly or briefly or give the main points or summary of
trace the shape of	trace the shape of
	draw up an outline or sketch for something