landholding vs ownership

landholding and ownership both are nouns.

Word	Noun	Adjective	Verb	Adverb
landholding	Yes	No	No	No
ownership	Yes	No	No	No

As nouns, ownership is a hypernym of landholding; that is, ownership is a word with a broader meaning than landholding:

landholding: ownership of land; the state or fact of owning land
ownership: the relation of an owner to the thing possessed; possession with the right to transfer possession to others

landholding (noun)	ownership (noun)
a holding in the form of land	the act of having and controlling property
ownership of land; the state or fact of owning land	the relation of an owner to the thing possessed; possession with the right to transfer possession to others
	the state or fact of being an owner