thing vs physical entity

thing and physical entity both are nouns.

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

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

thing (noun)	physical entity (noun)
a separate and self-contained entity	an entity that has physical existence
an action
an artifact
an entity that is not named specifically
any attribute or quality considered as having its own existence
a special abstraction
a special objective
a vaguely specified concern
a statement regarded as an object
an event
a persistent illogical feeling of desire or aversion
a special situation