common land vs lea

common land and lea both are nouns.

Word	Noun	Adjective	Verb	Adverb
common land	Yes	No	No	No
lea	Yes	No	No	No

As nouns, lea is a hypernym of common land; that is, lea is a word with a broader meaning than common land:

common land: a pasture subject to common use
lea: a field covered with grass or herbage and suitable for grazing by livestock

Other hypernyms of common land include grazing land, ley, pasture, pasture land, pastureland.

common land (noun)	lea (noun)
a pasture subject to common use	a field covered with grass or herbage and suitable for grazing by livestock
	a unit of length of thread or yarn