ley vs common land

ley and common land both are nouns.

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

As nouns, common land is a hyponym of ley; that is, common land is a word with a more specific, narrower meaning than ley:

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

Other hyponyms of ley include commons, cow pasture.

ley (noun)	common land (noun)
a field covered with grass or herbage and suitable for grazing by livestock	a pasture subject to common use