synopsis vs outline

synopsis and outline both are nouns.

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

As nouns, synopsis and outline are synonyms defined as:

synopsis and outline: a sketchy summary of the main points of an argument or theory

Other synonyms of synopsis include abstract, precis.

synopsis (noun)	outline (noun)
a sketchy summary of the main points of an argument or theory	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

synopsis (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