contriver vs plotter

contriver and plotter both are nouns.

Word	Noun	Adjective	Verb	Adverb
contriver	Yes	No	No	No
plotter	Yes	No	No	No

As nouns, plotter is a hyponym of contriver; that is, plotter is a word with a more specific, narrower meaning than contriver:

Other hyponyms of contriver include designer, intriguer, maneuverer, manoeuvrer, schemer, strategian, strategist, tactician.

contriver (noun)	plotter (noun)
a person who makes plans	an instrument (usually driven by a computer) for drawing graphs or pictures
	a member of a conspiracy
	a planner who draws up a personal scheme of action
	a clerk who marks data on a chart