protea vs honey-flower

protea and honey-flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
protea	Yes	No	No	No
honey-flower	Yes	No	No	No

As nouns, honey-flower is a hyponym of protea; that is, honey-flower 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
honey-flower: Australian shrub whose flowers yield honey copiously

Other hyponyms of protea include honeypot, king protea, Protea cynaroides, honeyflower, Protea mellifera.

protea (noun)	honey-flower (noun)
any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones	Australian shrub whose flowers yield honey copiously
	erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar