clearing vs piece of land

clearing and piece of land both are nouns.

Word	Noun	Adjective	Verb	Adverb
clearing	Yes	No	No	No
piece of land	Yes	No	No	No

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

clearing: a tract of land with few or no trees in the middle of a wooded area
piece of land: an extended area of land

Other hypernyms of clearing include parcel, parcel of land, piece of ground, tract.

clearing (noun)	piece of land (noun)
the act of freeing from suspicion	an extended area of land
the act of removing solid particles from a liquid
a tract of land with few or no trees in the middle of a wooded area