Rangifer tarandus vs caribou

Rangifer tarandus and caribou both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rangifer tarandus	Yes	No	No	No
caribou	Yes	No	No	No

As nouns, Rangifer tarandus and caribou are synonyms defined as:

Rangifer tarandus and caribou: Arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America

Other synonyms of Rangifer tarandus include Greenland caribou, reindeer.

Rangifer tarandus (noun)	caribou (noun)
Arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America	Arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America