public property vs holding

public property and holding both are nouns.

Word	Noun	Adjective	Verb	Adverb
public property	Yes	No	No	No
holding	Yes	No	No	No

As nouns, holding is a hypernym of public property; that is, holding is a word with a broader meaning than public property:

public property: property owned by a government
holding: something owned; any tangible or intangible possession that is owned by someone

Other hypernyms of public property include belongings, property.

public property (noun)	holding (noun)
property owned by a government	the act of retaining something
	something owned; any tangible or intangible possession that is owned by someone