politician vs schemer

politician and schemer both are nouns.

Word	Noun	Adjective	Verb	Adverb
politician	Yes	No	No	No
schemer	Yes	No	No	No

As nouns, schemer is a hypernym of politician; that is, schemer is a word with a broader meaning than politician:

politician: a schemer who tries to gain advantage in an organization in sly or underhanded ways
schemer: a planner who draws up a personal scheme of action

Other hypernyms of politician include plotter.

politician (noun)	schemer (noun)
a person active in party politics	a planner who draws up a personal scheme of action
a leader engaged in civil administration
a schemer who tries to gain advantage in an organization in sly or underhanded ways