Pterocnemia pennata vs nandu

Pterocnemia pennata and nandu both are nouns.

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

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

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

Other synonyms of Pterocnemia pennata include rhea.

Pterocnemia pennata (noun)	nandu (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