ball vs camphor ball

ball and camphor ball both are nouns.

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

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

ball: 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 ball include crystal ball, mothball, time-ball, fireball, fireball, globule, spherule, pellet, bolus.

ball (noun)	camphor ball (noun)
a pitch that is not in the strike zone	a small sphere of camphor or naphthalene used to keep moths away from stored clothing
a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs
round object that is hit or thrown or kicked in games
a spherical object used as a plaything
a solid projectile that is shot by a musket
a more or less rounded anatomical body or mass
one of the two male reproductive glands that produce spermatozoa and secrete androgens
a lavish dance requiring formal attire
a compact mass
an object with a spherical shape

ball (verb)	camphor ball (verb)
form into a ball by winding or rolling
to live very well