object vs physical entity

object and physical entity both are nouns.

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

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

object (noun)	physical entity (noun)
a tangible and visible entity; an entity that can cast a shadow	an entity that has physical existence
the goal intended to be attained (and which is believed to be attainable)
the focus of cognitions or feelings
(computing) a discrete item that provides a description of virtually anything known to a computer
(grammar) a constituent that is acted upon

object (verb)	physical entity (verb)
express or raise an objection or protest or criticism or express dissent
be averse to or express disapproval of