goat vs domestic goat

goat and domestic goat both are nouns.

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

As nouns, domestic goat is a hyponym of goat; that is, domestic 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
domestic goat: any of various breeds of goat raised for milk or meat or wool

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

goat (noun)	domestic goat (noun)
any of numerous agile ruminants related to sheep but having a beard and straight horns	any of various breeds of goat raised for milk or meat or wool
a victim of ridicule or pranks