leatherback vs leatherback turtle

leatherback and leatherback turtle both are nouns.

Word	Noun	Adjective	Verb	Adverb
leatherback	Yes	No	No	No
leatherback turtle	Yes	No	No	No

As nouns, leatherback and leatherback turtle are synonyms defined as:

leatherback and leatherback turtle: wide-ranging marine turtle with flexible leathery carapace; largest living turtle

Other synonyms of leatherback include Dermochelys coriacea, leathery turtle.

leatherback (noun)	leatherback turtle (noun)
wide-ranging marine turtle with flexible leathery carapace; largest living turtle	wide-ranging marine turtle with flexible leathery carapace; largest living turtle