prop vs physical object

prop and physical object both are nouns.

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

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

prop: any movable articles or objects used on the set of a play or movie
physical object: a tangible and visible entity; an entity that can cast a shadow

Other hypernyms of prop include object.

prop (noun)	physical object (noun)
a support placed beneath or against something to keep it from shaking or falling	a tangible and visible entity; an entity that can cast a shadow
a propeller that rotates to push against air
any movable articles or objects used on the set of a play or movie

prop (verb)	physical object (verb)
support by placing against something solid or rigid