nandu vs Pterocnemia pennata

nandu and Pterocnemia pennata both are nouns.

Word	Noun	Adjective	Verb	Adverb
nandu	Yes	No	No	No
Pterocnemia pennata	Yes	No	No	No

As nouns, nandu and Pterocnemia pennata are synonyms defined as:

nandu and Pterocnemia pennata: smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan

Other synonyms of nandu include rhea.

nandu (noun)	Pterocnemia pennata (noun)
smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan	smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan