pasture vs cow pasture

pasture and cow pasture both are nouns.

Word	Noun	Adjective	Verb	Adverb
pasture	Yes	No	Yes	No
cow pasture	Yes	No	No	No

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

pasture: a field covered with grass or herbage and suitable for grazing by livestock
cow pasture: a pasture for cows

Other hyponyms of pasture include common land, commons.

pasture (noun)	cow pasture (noun)
bulky food like grass or hay for browsing or grazing horses or cattle	a pasture for cows
a field covered with grass or herbage and suitable for grazing by livestock

pasture (verb)	cow pasture (verb)
feed as in a meadow or pasture
let feed in a field or pasture or meadow