carrying charge vs carrying cost

carrying charge and carrying cost both are nouns.

Word	Noun	Adjective	Verb	Adverb
carrying charge	Yes	No	No	No
carrying cost	Yes	No	No	No

As nouns, carrying charge and carrying cost are synonyms defined as:

carrying charge and carrying cost: the opportunity cost of unproductive assets; the expense incurred by ownership

carrying charge (noun)	carrying cost (noun)
charge made for carrying an account or for merchandise sold on an installment plan	the opportunity cost of unproductive assets; the expense incurred by ownership
the opportunity cost of unproductive assets; the expense incurred by ownership