orb vs camphor ball

orb and camphor ball both are nouns.

Word	Noun	Adjective	Verb	Adverb
orb	Yes	No	Yes	No
camphor ball	Yes	No	No	No

As nouns, camphor ball is a hyponym of orb; that is, camphor ball is a word with a more specific, narrower meaning than orb:

orb: an object with a spherical shape
camphor ball: a small sphere of camphor or naphthalene used to keep moths away from stored clothing

Other hyponyms of orb include crystal ball, mothball, time-ball, fireball, fireball, globule, spherule, pellet, bolus.

orb (noun)	camphor ball (noun)
the ball-shaped capsule containing the vertebrate eye	a small sphere of camphor or naphthalene used to keep moths away from stored clothing
an object with a spherical shape

orb (verb)	camphor ball (verb)
move in an orbit