scarabaeid beetle vs scarabaean

scarabaeid beetle and scarabaean both are nouns.

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

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

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

Other synonyms of scarabaeid beetle include scarabaeid.

scarabaeid beetle (noun)	scarabaean (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