sovereign vs monarch

sovereign and monarch both are nouns.

Word	Noun	Adjective	Verb	Adverb
sovereign	Yes	Yes	No	No
monarch	Yes	No	No	No

As nouns, sovereign and monarch are synonyms defined as:

sovereign and monarch: a nation's ruler or head of state usually by hereditary right

Other synonyms of sovereign include crowned head.

sovereign (noun)	monarch (noun)
a nation's ruler or head of state usually by hereditary right	large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
	a nation's ruler or head of state usually by hereditary right

sovereign (adjective)	monarch (adjective)
greatest in status or authority or power
(of political bodies) not controlled by outside forces