goose vs gander

goose and gander both are nouns.

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

As nouns, gander is a hyponym of goose; that is, gander is a word with a more specific, narrower meaning than goose:

goose: web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
gander: mature male goose

goose (noun)	gander (noun)
web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks	mature male goose
flesh of a goose (domestic or wild)
a man who is a stupid incompetent fool