prime minister vs chancellor

prime minister and chancellor both are nouns.

Word	Noun	Adjective	Verb	Adverb
prime minister	Yes	No	No	No
chancellor	Yes	No	No	No

As nouns, prime minister and chancellor are synonyms defined as:

prime minister and chancellor: the person who is head of government (in several countries)

Other synonyms of prime minister include premier.

prime minister (noun)	chancellor (noun)
the person who is head of government (in several countries)	the person who is head of government (in several countries)
	the honorary or titular head of a university