moon vs physical object

moon and physical object both are nouns.

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

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

moon: any object resembling a moon
physical object: a tangible and visible entity; an entity that can cast a shadow

Other hypernyms of moon include object.

moon (noun)	physical object (noun)
any natural satellite of a planet	a tangible and visible entity; an entity that can cast a shadow
any object resembling a moon
the natural satellite of the Earth
the period between successive new moons (29.531 days)

moon (verb)	physical object (verb)
expose one's buttocks to
be idle in a listless or dreamy way
have dreamlike musings or fantasies while awake