goat vs wild goat

goat and wild goat both are nouns.

Word	Noun	Adjective	Verb	Adverb
goat	Yes	No	No	No
wild goat	Yes	No	No	No

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

goat: any of numerous agile ruminants related to sheep but having a beard and straight horns
wild goat: undomesticated goat

Other hyponyms of goat include kid, billy, billy goat, he-goat, nanny-goat, nanny, she-goat, Capra hircus, domestic goat.

goat (noun)	wild goat (noun)
any of numerous agile ruminants related to sheep but having a beard and straight horns	undomesticated goat
a victim of ridicule or pranks