royal vs monarch

royal and monarch both are nouns.

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

royal (noun)	monarch (noun)
stag with antlers of 12 or more branches	large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
a sail set next above the topgallant on a royal mast	a nation's ruler or head of state usually by hereditary right

royal (adjective)	monarch (adjective)
of or relating to or indicative of or issued or performed by a king or queen or other monarch
established or chartered or authorized by royalty
invested with royal power as symbolized by a crown
being of the rank of a monarch
belonging to or befitting a supreme ruler