serow vs goat antelope

serow and goat antelope both are nouns.

Word	Noun	Adjective	Verb	Adverb
serow	Yes	No	No	No
goat antelope	Yes	No	No	No

As nouns, goat antelope is a hypernym of serow; that is, goat antelope is a word with a broader meaning than serow:

serow: short-horned dark-coated goat antelope of mountain areas of southern and southeastern Asia
goat antelope: bovid related to goats but having antelope-like features: mountain goats, gorals, serows, chamois, gnu goats

serow (noun)	goat antelope (noun)
short-horned dark-coated goat antelope of mountain areas of southern and southeastern Asia	bovid related to goats but having antelope-like features: mountain goats, gorals, serows, chamois, gnu goats