plot vs complot

plot is a noun but complot is not a noun.

Word	Noun	Adjective	Verb	Adverb
plot	Yes	No	Yes	No
complot	No	No	Yes	No

As verbs, complot is a hyponym of plot; that is, complot is a word with a more specific, narrower meaning than plot:

Other hyponyms of plot include cabal, conjure, conspire, machinate, counterplot, connive, intrigue, scheme.

plot (noun)	complot (noun)
a secret scheme to do something (especially something underhand or illegal)
the story that is told in a novel or play or movie etc.
a chart or graph showing the movements or progress of an object
a small area of ground covered by specific vegetation

plot (verb)	complot (verb)
plan secretly, usually something illegal	engage in plotting or enter into a conspiracy, swear together
make a plot of
make a schematic or technical drawing that shows interactions among variables or how something is constructed
devise the sequence of events in (a literary work or a play, movie, or ballet)