greyback vs Limnodromus griseus

greyback and Limnodromus griseus both are nouns.

Word	Noun	Adjective	Verb	Adverb
greyback	Yes	No	No	No
Limnodromus griseus	Yes	No	No	No

As nouns, greyback and Limnodromus griseus are synonyms defined as:

Other synonyms of greyback include grayback.

greyback (noun)	Limnodromus griseus (noun)
a dowitcher with a grey back	a dowitcher with a grey back
a sandpiper that breeds in the Arctic and winters in the Southern Hemisphere
`Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms