rose beetle vs scarabaeid

rose beetle and scarabaeid both are nouns.

Word	Noun	Adjective	Verb	Adverb
rose beetle	Yes	No	No	No
scarabaeid	Yes	No	No	No

As nouns, scarabaeid is a hypernym of rose beetle; that is, scarabaeid is a word with a broader meaning than rose beetle:

rose beetle: a common metallic green European beetle: larvae feed on plant roots and adults on leaves and flowers of e.g. roses
scarabaeid: any of numerous species of stout-bodied beetles having heads with horny spikes

Other hypernyms of rose beetle include scarabaean, scarabaeid beetle.

rose beetle (noun)	scarabaeid (noun)
a common metallic green European beetle: larvae feed on plant roots and adults on leaves and flowers of e.g. roses	any of numerous species of stout-bodied beetles having heads with horny spikes