brant vs goose

brant and goose both are nouns.

Word	Noun	Adjective	Verb	Adverb
brant	Yes	No	No	No
goose	Yes	No	Yes	No

As nouns, goose is a hypernym of brant; that is, goose is a word with a broader meaning than brant:

brant: small dark geese that breed in the north and migrate southward
goose: web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks

brant (noun)	goose (noun)
small dark geese that breed in the north and migrate southward	web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
	flesh of a goose (domestic or wild)
	a man who is a stupid incompetent fool