scarabaean vs scarabaeid beetle

scarabaean and scarabaeid beetle both are nouns.

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

As nouns, scarabaean and scarabaeid beetle are synonyms defined as:

scarabaean and scarabaeid beetle: any of numerous species of stout-bodied beetles having heads with horny spikes

Other synonyms of scarabaean include scarabaeid.

scarabaean (noun)	scarabaeid beetle (noun)
any of numerous species of stout-bodied beetles having heads with horny spikes	any of numerous species of stout-bodied beetles having heads with horny spikes