pastureland vs pasture

pastureland and pasture both are nouns.

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

As nouns, pastureland and pasture are synonyms defined as:

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

Other synonyms of pastureland include grazing land, lea, ley, pasture land.

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

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