politician vs Mugwump

politician and Mugwump both are nouns.

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

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

politician: a person active in party politics
Mugwump: someone who bolted from the Republican Party during the U.S. presidential election of 1884

politician (noun)	Mugwump (noun)
a person active in party politics	someone who bolted from the Republican Party during the U.S. presidential election of 1884
a leader engaged in civil administration
a schemer who tries to gain advantage in an organization in sly or underhanded ways