crowned head vs monarch

crowned head and monarch both are nouns.

Word	Noun	Adjective	Verb	Adverb
crowned head	Yes	No	No	No
monarch	Yes	No	No	No

As nouns, crowned head and monarch are synonyms defined as:

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

Other synonyms of crowned head include sovereign.

crowned head (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