greyback vs dowitcher

greyback and dowitcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
greyback	Yes	No	No	No
dowitcher	Yes	No	No	No

As nouns, dowitcher is a hypernym of greyback; that is, dowitcher is a word with a broader meaning than greyback:

greyback (noun)	dowitcher (noun)
a dowitcher with a grey back	shorebird of the sandpiper family that resembles a snipe
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