neighbor vs physical object

neighbor and physical object both are nouns.

Word	Noun	Adjective	Verb	Adverb
neighbor	Yes	No	Yes	No
physical object	Yes	No	No	No

As nouns, physical object is a hypernym of neighbor; that is, physical object is a word with a broader meaning than neighbor:

neighbor: a nearby object of the same kind
physical object: a tangible and visible entity; an entity that can cast a shadow

Other hypernyms of neighbor include object.

neighbor (noun)	physical object (noun)
a nearby object of the same kind	a tangible and visible entity; an entity that can cast a shadow
a person who lives (or is located) near another

neighbor (verb)	physical object (verb)
be located near or adjacent to
live or be located as a neighbor