caribou vs reindeer

caribou and reindeer both are nouns.

Word	Noun	Adjective	Verb	Adverb
caribou	Yes	No	No	No
reindeer	Yes	No	No	No

As nouns, caribou and reindeer are synonyms defined as:

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

Other synonyms of caribou include Greenland caribou, Rangifer tarandus.

caribou (noun)	reindeer (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