mothball vs naphthalene

mothball and naphthalene both are nouns.

Word	Noun	Adjective	Verb	Adverb
mothball	Yes	No	Yes	No
naphthalene	Yes	No	No	No

mothball (noun)	naphthalene (noun)
a small sphere of camphor or naphthalene used to keep moths away from stored clothing	a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs

mothball (verb)	naphthalene (verb)
put into long-term storage