Caretta caretta vs loggerhead

Caretta caretta and loggerhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caretta caretta	Yes	No	No	No
loggerhead	Yes	No	No	No

As nouns, Caretta caretta and loggerhead are synonyms defined as:

Caretta caretta and loggerhead: very large carnivorous sea turtle; wide-ranging in warm open seas

Other synonyms of Caretta caretta include loggerhead turtle.

Caretta caretta (noun)	loggerhead (noun)
very large carnivorous sea turtle; wide-ranging in warm open seas	very large carnivorous sea turtle; wide-ranging in warm open seas
	a stupid person; these words are used to express a low opinion of someone's intelligence