mastermind vs plan

mastermind and plan both are nouns.

Word	Noun	Adjective	Verb	Adverb
mastermind	Yes	No	Yes	No
plan	Yes	No	Yes	No

As verbs, plan is a hypernym of mastermind; that is, plan is a word with a broader meaning than mastermind:

mastermind (noun)	plan (noun)
someone who creates new things	scale drawing of a structure
someone who has exceptional intellectual ability and originality	a series of steps to be carried out or goals to be accomplished
	an arrangement scheme

mastermind (verb)	plan (verb)
plan and direct (a complex undertaking)	make plans for something
	have the will and intention to carry out some action
	make or work out a plan for; devise