protea vs king protea

protea and king protea both are nouns.

Word	Noun	Adjective	Verb	Adverb
protea	Yes	No	No	No
king protea	Yes	No	No	No

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

protea: any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones
king protea: South African shrub whose flowers when open are cup-shaped resembling artichokes

Other hyponyms of protea include honeypot, Protea cynaroides, honey-flower, honeyflower, Protea mellifera.

protea (noun)	king protea (noun)
any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones	South African shrub whose flowers when open are cup-shaped resembling artichokes